Patent Application
20170197924
The present invention relates to novel triazole antifungal agents of the formula (I).
Wherein, R1 is halogens such as fluorine, chlorine or bromine, CF3, alkyl;
The present invention also relates to a process for the preparation of the novel antifungal agents of the formula (I) from alkynols and 2-azidophenols.
Triazole moiety is an important and frequent insecticide, agrochemical structure feature of many biological active compound as cytocrome p450 enzyme inhibitors and peptide analog inhibitor. The azole class of antifungal agent is chemical either an imidazole or a triazole group joined to an asymmetric carbon atom as their functional pharmacophore treatment for these infection azole like antifungal agent are Ketoconazole, Fluconazole, Voriconazole and Itraconazole 1, 2, 4-triazole are as analgesic antiasthmatic, antibacterial, anticholinergic activity. They are aromatic ring compounds similar to the azole, pyrazole and imidazole but with an additional nitrogen atom in the ring structure. Like the azoles, triazoles are used in many antifungal drugs and fungicides, but the triazole-based drugs are more selective for fungi than mammalian cells than the azole-based antifungal compounds.
In recent years, triazole-containing compounds have become potential targets for drug discovery. 1,2,3-triazole moiety is an important pharmacophore present in diverse medicinally important molecules with potential applications as anticancer, HIV protease inhibitors, anti-tubercular, antibacterials, and as a core structure of azole class of antifungal drugs (Agalave et al., 2011). There were very few antifungal agents (mainly polyenes) in clinical use till 1980. The development of azoles namely; ketoconazole, miconazole, fluconazole in 80's and itraconazole, posaconazole, voriconazole in 90's resulted in rapid advancement of antifungal therapy. These azoles were effective against fungal pathogens that were refractory to the polyenes and available both in intravenous and oral formulations. However over the years, many fungal pathogens developed resistance against fluconazole and other azoles due to their wide use as first line drugs in treatment. Triazole analogues of several bioactive compounds have recently been reported. Examples are those of the well-known highly functionalizcd antiviral cyclic amino acid derivatives oscltamivir and zanamivir. The 1,2,3-triazole moiety is a constituent part of many modified nucleosides or carbanucleosides with antiviral, anti-HIV or cytostatic activities. However, the scope of triazole chemistry is not confined to drug discovery.
Article titled “Regio-selective synthesis of 1,4-disubstituted-1,2,3-triazoles and evaluation of their antimicrobial activity” by R Parveen et al. published in Asian Journal of Biomedical and Pharmaceutical Sciences, 15 Jun. 2014, 4(32), 44-47 reports a series of 1,4-disubstituted 1,2,3-triazoles synthesized via Cu(I) catalyzed reaction between terminal alkyne and substituted phenyl azides. The synthesized triazoles are characterized by 1 H NMR and mass spectral techniques. The synthesized compounds are evaluated for their antimicrobial activity against Escherichia coli, Staphylococcus aureus, Aspergillus niger by well diffusion method.
Article titled “Regioselective syntheses of fully-substituted 1,2,3-triazoles: the CuAAC/C-H bond functionalization nexus” by L Ackermann et al. published in Org. Biomol. Chem., 2010,8, 4503-4513 reports regioselective synthesis of 1,4,5-trisubstituted 1,2,3-triazoles by three different strategics, relying on (i) the interception of stoichiometrically formed 5-cuprated- 1,2,3-triazoles, (ii) the use of stoichiometrically functionalized alkynes or (iii) catalytic C═H bond functionalizations.
Article titled “Efficient continuous-flow synthesis of novel 1,2,3-triazole-substituted β-aminocyclohexanecarboxylic acid derivatives with gram-scale production” by S B Otvös et al. published in Beilstein J Org Chem, 2013, 9, pp 1508-16 reports preparation of novel multi-substituted 1,2,3-triazole-modified β-aminocyclohexanecarboxylic acid derivatives in a simple and efficient continuous-flow procedure. The 1,3-dipolar cycloaddition reactions are performed with copper powder as a readily accessible Cu(I) source. Initially, high reaction rates was achieved under high-pressure/high-temperature conditions. Subsequently, the reaction temperature was lowered to room temperature by the joint use of both basic and acidic additives to improve the safety of the synthesis, as azides were to be handled as unstable reactants.
Most useful and powerful procedure for the synthesis of 1,2,3-triazolcs is the Huisgen 1,3-dipolar cycloaddition of organic azides with acetylenes. The classical Huisgen reaction, thermally induced, gives an approximate 1:1 mixture of 1,4- and 1,5-disubstituted 1,2,3-triazole isomers. However, when Cu(I) catalysis is applied, the reaction becomes regioselective, exclusively yielding the 1,4-regioisomer within a relatively short reaction time. Recently, Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) has become the basis of the so-called click chemistry concept due to its wide applicability and efficiency.
Moreover, other drawbacks associated with azoles, such as narrow spectrum, low oral bioavailability, drug-drug interactions, and hepatic toxicity reduced their efficacy and needs to be overcome.
Therefore, there is need for development of new azole derivatives with broad spectrum activity and better efficacy and safety. Accordingly the inventors have designed three classes of 1,2,3 -triazole compounds as novel anti-fungal agents. These compounds are easy to synthesize from simple starting materials, processes are green, convergent, carried at room temperature and highly scalable.
The main objective of the present invention is to provide a novel triazole antifungal agents of formula (I).
Another objective of the present invention is to provide a process for the synthesis of novel triazole antifungal agents of formula (I).
Wherein, R1 is halogens such as fluorine, chlorine or bromine, CF3, alkyl;
In an aspect, the present invention provides a process for the synthesis of novel triazole antifungal agents of formula (I) from alkynols and 2-azidophenols.
The invention will now be described in detail in connection with certain preferred and optional embodiments, so that various aspects thereof may be more fully understood and appreciated.
The present invention provides a novel triazole antifungal agents of formula (I) and process for preparation thereof.
In an embodiment, the present invention provides a novel antifungal agents compound of formula (I) (1/Type-I or 2/Type-II),
Wherein, R1 is halogens such as fluorine, chlorine, bromine, CF3, alkyl;
In another preferred embodiment, the compounds of formula (I) are:
In one embodiment, the present invention provides a process for the synthesis of novel triazole compounds of formula (I), with >75% yields comprising the steps of:
The above process is shown below in Scheme 1:
The 2-azidophenols is selected from the group of compounds consisting of formula 5y.
The alkyne is selected from the group of compounds consisting of formula 4x or 7x.
In another embodiment, the invention discloses use of compounds of Formula (I) as antifungal agents.
In another preferred embodiment, the invention discloses pharmaceutical preparations which comprise a compound of Formula (I) in association with at least one pharmaceutical excipient known in art. These excipients are added to the composition for a variety of purposes.
The pharmaceutical preparations can be selected from various dosage forms such as solid dosage form like tablets, capsules, pellets, powders, soft gelatin capsules, and the like and oral liquids. The tablets can be prepared as conventional dosage forms such as immediate release, sustained release, modified release or controlled release.
The pharmaceutical compositions can be prepared using conventional techniques well known in the art.
According to another embodiment, the invention provides method for treating or preventing antifungal infections in a subject, wherein said method comprises administering therapeutically effective amounts of the compounds of formula (I) of the present invention or pharmaceutical composition comprising the same. The compounds of the present invention can also be administered optionally with other actives depending on the disease conditions.
As used herein the term “therapeutically effective amount” means an amount used in the pharmaceutical preparations to achieve the desired therapeutic effect.
The amount/quantity of the compound used in pharmaceutical compositions of the present invention will vary depending upon the body weight of the patient and the mode of administration and can be of any effective amount to achieve the desired therapeutic effect.
The invention further provides use of the compounds of Formula (I) in the preparation of pharmaceutical medicament.
The antifungal activity of novel compounds of formula (I) (1Type-I or 2/Type-II) is summarized below in Table: 1 and Table: 2.
The following examples, which include preferred embodiments, will serve to illustrate the practice of this invention, it being understood that the particulars shown are by way of example and for purpose of illustrative discussion of preferred embodiments of the invention.
To a solution of azide 5 (1.0 eq.) and alkyne 4 (1.1 eq.) in 1BuOH:H2O (3:1) at room temperature, sodium ascorbate (0.95 eq.) and CuSO4 (0.2 eq.) were added and the resulting brick reddish mixture was stirred vigorously for 10 min. The reaction mixture was diluted and extracted with EtOAc. The organic layer was dried over Na2SO4 and the solvents were evaporated under reduced pressure. The product was purified by column chromatography.
To a solution of azide 5 (1.0 eq.) and alkyne 7 (1.1 eq.) in tBuOH: H2O (3:1) at room temperature, sodium ascorbate (0.95 eq.) and CuSO4 (0.2 eq.) were added and the resulting brick reddish mixture was stirred vigorously for 10 min. The reaction mixture was diluted and extracted with EtOAc. The organic layer was dried over Na2SO4 and the solvents were evaporated under reduced pressure. The product was purified by column chromatography.
4-Chloro-2-(4-((3,5-dimethylphenyl)(hydroxy)methyl)-1H-1,2,3-triazol-1-yl)phenol (1aa):
Isolated by column chromatography (pet.ether/AcOEt=6:4, Rƒ=0.3). The title compound was determined as colourless solid (86%). Mp: 191-193° C.; 1H NMR (200 MHz, CDCl3): δ2.34 (s, 6 H), 2.74 (d, J=3.5 Hz, 1H), 6.06 (d, J=2.9 Hz, 1 H), 7.00 (s, 1 H), 7.08-7.16 (m, 2 H), 7.26 (dd, J=2.3, 8.8 Hz, 2H), 7.37 (d, J=2.4 Hz, 1H), 7.88 (s, 1 H), 9.91 (s, 1H) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)): δ21.3 (q, 2 C), 69.4 (d), 119.1 (d), 119.6 (d), 120.2 (d), 120.4 (d), 121.4 (s), 124.1 (d, 2 C), 130.1 (d), 135.0 (s), 138.5 (s, 2 C), 141.2 (s), 150.0 (s), 151.6 (s) ppm; IR(cm−1): 3306, 3136, 2944, 1645, 1564, 1442, 1318, 1262, 1063, 875, 751, 669; HRMS(ESI) calcd for C17H17O2N3Cl(M++H): 330.1004; found: 330.1004.
2-(4-((3,5-Bis(trifluoromethyl)phenyl)(hydroxy)methyl)-1H-1,2,3-triazol-1-yl)-4-chlorophenol (1ba):
Isolated by column chromatography (pct.ether/AcOEt=6.4, Rƒ=0.3). The title compound was determined as colourless solid (83%). Mp: 211-213° C.; 1H NMR (200 MHz, CDCl3+MeOH (D4)): δ5.99 (s, 1H), 6.81 (d, J=8.7 Hz, 1H), 7.06 (dd, J=2.5, 8.7 Hz, 1H), 7.58 (d, J=2.5 Hz, 1H), 7.64 (bs, 1H), 7.86 (bs, 2H), 8.11 (s, 1H) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)): δ67.1 (d), 117.9 (d), 120.3 (s), 120.5 (d, t, J=3.7 Hz), 123.1 (d), 123.5 (d, 2C), 124.2 (s), 124.6 (s), 125.7 (s), 126.4 (d, J=1.8 Hz), 129.1 (d), 130.6 (s, d, J=33.3 Hz), 131.9 (s, d, J=33.7 Hz), 145.2 (s), 147.4 (s), 149.7 (s) ppm; IR(cm−1): 3393, 3133, 2959, 1647, 1448, 1300, 1260, 876, 751, 724; HRMS(ESI) calcd for C17 H11O2N3CIF6 (M++H): 438.0439; found: 438.0445.
4-chloro-2-(4-(2-hydroxy-2-phenylethyl)-1H-1,2,3-triazol-1-yl)phenol (1ea):
Isolated by column chromatography (pet.ether/AcOEt=6:4, Rƒ=0.4). The title compound was determined as yellow solid (86%). Mp: 177-179° C.; 1H NMR (200 MHz, CDCl3+MeOH(D4)): δ0.73 (t, J=7.3 Hz, 3H), (m, 2 H), 6.82 (d, J =8.8 Hz, 1H), (m, 4H), 7.32-7.43 (m, 2H), 7.55 (d, J=2.5 Hz, 1H), 8.05 (s, 1H) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)): δ 7.3 (q), 34.6 (t), 74.3 (s), 118.1 (d), 122.6 (d), 123.2 (d), 124.2 (s), 124.6 (s), 125.3 (d, 2C), 126.6 (d), 127.7 (d, 2C), 129.1 (d), 144.8 (s), 147.4 (s), 154.1 (s) ppm; IR(cm−1): 3359, 3121, 2960, 1647, 1547, 1428, 1373, 1251, 1163, 966, 855, 754, 673; HRMS(ESI) calcd for C17H17O2N3Cl(M++H): 330.1004; found: 330.1007.
5-Chloro-2-(4-((3,5-dimethylphenyl)(hydroxy)methyl)-1H-1,2,3-triazol-1-yl)phenol (1ab):
Isolated by column chromatography (pet.ether/AcOEt=6:4, Rƒ=0.3). The title compound was determined as colourless solid (82%). Mp: 223-224° C.; 1H NMR (200 MHz, CDCl3): δ 2.31 (s, 6 H), 6.03 (s, 1H), 6.94 (d, J= 2.2, 8.7 Hz, 2H), 7.08 (s, 2H), 7.17 (d, J=2.3 Hz, 1H), 7.28 (d, J=8.6 Hz, 1H), 7.88 (s, 1H); 13C NMR (50 MHz, CDCl3): δ 21.3 (q, 2C), 69.4 (d), 119.1 (d), 119.6 (d), 120.2 (d), 120.4 (d), 121.4 (s), 124.1 (d, 2C), 130.1 (d), 135.0 (s), 138.5 (s, 2C), 141.2 (s), 150.0 (s), 151.6 (s) ppm; IR (cm−1): 3325, 3122, 2987, 2405, 1648, 1567, 1460, 1336, 1226, 1058, 874, 760, 664; HRMS(ESI) calcd for C17H17O2N3Cl(M++H): 330.1004; found: 330.1005.
5-Chloro-2-(4-(1-hydroxy-1-phenylethyl)-1H-1,2,3-triazol-1-yl)phenol (2cb):
Isolated by column chromatography (pet.ether/AcOEt=6:4, Rƒ=0.4). The title compound was determined as colourless solid (79%). Mp:232-234° C.; 1H NMR (200 MHz, CDCl3+MeOH (D4)): δ 2.02 (s, 3H), 6.96 (dd, J=2.2, 8.6 Hz, 1H ), 7.07 (d, J =2.3 Hz, 1H), 7.22-7.36 (m, 3H), 7.50-7.56 (m, 2H), 7.63 (d J=8.6 1Hz, 1H), 8.20 (s, 1H) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)): δ 28.9 (q), 70.9 (s), 116.2 (d), 119.1 (d), 122.4 (d), 122.8 (s), 124.5 (d, 2C), 124.7 (d), 126.1 (d), 127.2 (d, 2C), 134.3 (s), 146.1 (s), 149.4 (s), 154.3 (s) ppm; IR(cm−1): 3309, 3160, 2987, 1642, 1555, 1443, 1362, 1266, 1109, 1013, 975, 871, 753, 678; HRMS(ESI) calcd for C16H15O2N3Cl(M++H): 316.0847; found: 316.0846.
4-Chloro-2-(4-(2-hydroxy-2-phenylethyl)-1H-1,2,3-triazol-1-yl)phenol (1ea):
Isolated by column chromatography (pet.ether/AcOEt=6:4, Rƒ=0.3). The title compound was determined as colourless solid (83%). Mp: 148-150° C.; 1H NMR (200 MHz, CDCl3+MeOH(D4)): δ 3.22 (d, J=5.3 Hz, 2H), 5.04 (t, J=6.6 Hz, 1H), 7.03 (d, J=8.8 Hz, 1H), 7.22-7.43 (m, 6H), 7.71 (d, .7-2.5 Hz, 1H), 8.08 (s, 111) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)) δ 34.8 (t), 72.5 (d), 117.7 (d), 123.3 (d), 123.8 (s), 123.9 (d), 124.6 (s), 125.3 (d, 2C), 126.9 (d), 127.8 (d, 2C), 129.0 (d), 143.2 (s), 143.7 (s), 147.4 (s) ppm; IR (cm−1): 3363, 3131, 2998, 1643, 1552, 1314, 1253, 1044, 863, 764, 661; HRMS(ESI) calcd for C16H15O2N3Cl (M++H): 316.0847; found: 316.0847.
5-Chloro-2-(4-(2-hydroxy-2-phenylethyl)-1H-1,2,3-triazol-1-yl)phenol (1eb):
Isolated by column chromatography (pet.ether/AcOEt=6:4, Rƒ=0.3). The title compound was determined as colourless solid (83%). Mp: 171-172° C.; 1H NMR (200 MHz, CDCl3+MeOH (D4)) δ 3.19 (s, 2H), 5.01 (s, 1H), 6.95 (d, J=8.3 Hz, 1H), 7.06 (s, 1H), 7.25-7.36 (m, 5H), 7.58 (d, J=8.0 Hz, 1H), 8.01 (s, 1H) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)) δ 34.7 (t), 72.4 (d), 116.4 (d), 119.3 (d), 122.9 (s), 124.7 (d), 125.2 (d, 2C), 126.8 (d), 127.6 (d, 3C), 134.4 (s, 2C), 143.2 (s), 149.5 (s) ppm; IR (cm−1): 3341, 3142, 2972, 1651, 1563, 1324, 1221, 1063, 873, 750, 668; HRMS(ESI) calcd for C16H15O2N3Cl (M++H): 316.0847; found: 316.0854.
4-Chloro-2-(4-(2-hydroxy-2-phenylpropyl)-1H-1,2,3-triazol-1-yl)phenol (2fa):
Isolated by column chromatography (pet.ether/AcOEt=6:4, R71 =0.4). The title compound was determined as colourless solid (79%). Mp: 180-181° C.; 1H NMR (200 MHz, CDCl3+MeOH (D4)) δ 1.61 (s, 3H), 3.28 (s, 2H), 6.98 (d, J=8.8 Hz, 1H), 7.20-7.37 (m, 4H), 7.43-7.49 (m, 2H), 7.65 (d, J=2.5 Hz, 1H), 7.83 (s, 1H) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)) δ 27.9 (q), 39.5 (t), 73.0 (s), 117.6 (d), 123.3 (d), 123.7 (s), 124.3 (d, 3C), 124.5 (s), 126.0 (d), 127.4 (d, 2C), 128.9 (d), 142.9 (s), 146.7 (s), 147.4 (s) ppm; IR(cm−1): 3344, 3067, 2950, 1942, 1736, 1645, 1598, 1437, 1303, 1233, 1 158, 880, 748, 624; HRMS(ESI) calcd for C17H17O2N3Cl (M++H): 330.1004; found: 330.0999.
5-Chloro-2-(4-(2-hydroxy-2-phenylpropyl)-1H-1,2,3-triazol-1-yl)phenol (2fb):
Isolated by column chromatography (pet.ether/AcOEt=6:4, R71=0.4). The title compound was determined as colourless solid (83%). Mp: 189-190° C.; 1H NMR (200 MHz, CDCl3+MeOH (D4)) δ 1.61 (s, 3H), 3.28 (s, 2H), 6.95 (dd, J=2.3, 8.6 Hz, 1H), 7.05 (d, J=2.3 Hz, 1H), 7.22-7.36 (m, 3H), 7.44-7.49 (m, 2H), 7.55 (d, J=8.6 Hz, 1H), 7.76 (s, 1H) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)): δ 28.2 (q). 39.6 (t), 73.1 (s), 116.6 (d), 119.4 (d), 122.9 (s), 124.4 (d, 3C), 124.7 (d), 126.1 (d), 127.5 (d, 2C), 134.5 (s), 142.9 (s), 146.7 (s), 149.6 (s) ppm; IR(cm−1): 3448, 3162, 3022, 2929, 1643, 1552, 1445, 1364, 1263, 1 155, 1006, 923, 874, 763; HRMS(ESI) calcd for C17H17O2N3Cl(M++H): 330.1004; found: 330.1009.
4-Chloro-2-(4-(2-hydroxy-2-phenylbutyl)-1H-1,2,3-triazol-1-yl)phenol (2ga):
Isolated by column chromatography (pet.ether/AcOEt=6:4, Rƒ=0.4). The title compound was determined as colourless solid (85%). Mp: 153-155° C.; 1H NMR (400 MHz, CDCl3+MeOH (D4)): δ 0.80 (t, J=7.0 Hz, 3H), 1.85-2.02 (s, 1H), 3.32 (s, 2H), 6.97 (d, J=8.0 Hz, 1H), 7.18-7.22 (m, 2H), 7.31 (t, J=7.3 Hz, 2H), 7.37-7.42 (m, 2H), 7.57 (s, 1H), 7.71 (s, 1H) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)): δ 7.5 (q), 34.7 (t), 38.4 (t), 76.5 (s), 118.7 (d), 122.8 (d), 123.4 (d), 124.4 (s, 2C), 125.3 (d, 2C), 126.4 (d), 127.9 (d, 2C), 129.4 (d), 143.5 (s), 144.7 (s), 147.7 (s) ppm; IR(cm−1): 3329, 3 173, 2953, 1632, 1558, 1 558, 1431 , 1373, 1264, 1 161, 971 , 872, 748, 720, 683; HRMS(ESI) calcd for C18H19O2N3Cl(M++H): 344.1160; found: 344.1 164.
5-Chloro-2-(4-(2-hydroxy-2-phenylbutyl)-1H-1,2,3-triazol-1-yl)phenol (2gb):
Isolated by column chromatography (pet.ether/AcOEt=6:4, Rƒ=0.4). The title compound was determined as yellow solid (80%). Mp: 129-131° C.; 1H NMR (400 MHz, CDCl3+MeOH (D4)): δ 0.79 (t, J=7.4 Hz, 3H), 1.83-2.05 (m, 2H), 3.32 (s, 2H), 6.88 (dd, J=8.5, 2.3 Hz, 1H), 7.05 (d, J=2.3 Hz, 1H), 7.18-7.22 (m, 1H), 7.28-7.34 (m, 3H), 7.38-7.40 (m, 2H), 7.57 (bs, 1H) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)): δ 7.8 (q), 35. 1 (t), 38.5 (t), 76.7 (s), 118.6 (d), 120.2 (d), 122.0 (d), 125.4 (d, 3C), 126.6 (d), 128. 1 (d, 2C), 134.8 (s, 2C), 144.7 (s, 2C), 149.8 (s) ppm; IR(cm−1): 3333, 3329, 2972, 1642, 1547, 1428, 1363, 1271, 1167, 971, 872, 747, 684; HRMS(ESI) calcd for C18H19O2N3Cl(M++H): 344.1161; found: 344.1 164.
4-chloro-2-(4-(2-hydroxy-2-phenylhexyl)-1H-1,2,3-triazol-1-yl)phenol (2ha):
Isolated by column chromatography (pet.ether/AcOEt=6:4, Rƒ=0.5). The title compound was determined as colourless solid (86%). Mp: 165-167° C.; 1H NMR (400 MHz, CDCl3+MeOH (D4)): δ 0.83 (t, J=7.3 Hz, 3H), 1.01-1.11 (m, 1H), 1.20-1.36 (m, 3H), 1.81-1.89 (m, 1H), 1.91-1.99 (m, 1H), 3.32 (t, J=15.3 Hz, 1H), 4.03 (bs, 2H), 6.98 (d, J=8.8 Hz, 1H), 7.19-7.23 (m, 2H), 7.32 (t, J=7.8 Hz, 1H), 7.40 (d, J=7.5 Hz, 2H), 7.58 (d, J=2.3 Hz, 1H), 7.69 (s) ppm: 13C NMR (100 MHz, CDl3+MeOH (D4)): δ 13.4 (q), 22.6 (t), 25.2 (t), 38.7 (t), 41 .7 (t), 76.0 (s), 118.2 (d), 123.2 (d), 123.9 (d), 124.1 (s), 124.6 (s), 125.1 (d, 2C), 126. 1 (d), 127.7 (d, 2C), 129.2 (d), 143.2 (s), 145.0 (s), 147.6 (s) ppm; IR(cm−1): 3459, 3116, 2980, 1639, 1547, 1334, 1231, 1056, 869, 750; HRMS(ESI) calcd for C20H23O2N3Cl (M++H): 372.1473; found: 372.1471.
4-Chloro-2-(4-(2-hydroxy-2,2-diphenylethyl)-1H-1,2,3-triazol-1-yl)phenol (2ia):
Isolated by column chromatography (pet.ether/AcOEt=7:3, Rƒ=0.5). The title compound was determined as colourless solid (83%). Mp: 194-196° C.; 1H NMR (200 MHz, CDCl3+MeOH (D4)): δ 3.82 (s, 2H), 6.96 (d, J=8.7 Hz, 1H), 7.17-7.35 (m, 7H), 7.46-7.51 (m, 6H), 7.58 (d, J=2.5 Hz, 1H, ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)): δ 37.9 (t), 77.2 (s), 118.0 (d), 123.3 (d), 124.0 (s), 124.2 (d), 124.5 (s), 125.8 (d. 4C), 126.5 (d, 2C), 127.6 (d, 4C), 129.1 (d), 143.1 (s), 146.0 (s, 2C), 147.5 (s) ppm; IR(cm−1): 3355, 3173, 2988, 1637 1529. 1435, 1263. 1152, 984, 873, 759, 620; HRMS(ESI) calcd for C22H19O2N3Cl (M++H): 392.1160: found: 392.1162.
5-Chloro-2-(-4-(2-hydroxy-2,2-diphenylethyl)-1H-1,2,3-triazol-1-yl)phenol (2ib):
Isolated by column chromatography (pet.ether/AcOEt=7.3, R71=0.5). The title compound was determined as colourless solid (81%). Mp: 210-212° C.; 1H NMR (200 MHz, CDCl3+MeOH (D4)): δ 3.81 (s, 2H), 6.89 (dd, J=2.2, 8.6 Hz, 1H), 7.02 (m, 1H), 7.15-7.33 (m. 6H), 7.38 (d, J=1.6H), 7.43-7.50 (m, 4H). 7.54 (s, 1H) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)): δ 38.0 (t), 77.2 (s), 117.3 (d), 119.8 (d), 122.8 (s), 123.9 (d), 124.2 (d), 125.9 (d, 4C), 126.7 (d, 2C), 127.8 (d, 4C), 134.7 (s), 143,2 (S) 146.0 (s. 2C). 149.7 (s) ppm: IR-(cm−1): 3321, 3137, 2970, 1639. 1598, 1543, 1437, 1323, 1236, 1152, 870 740, 625; HRMS(ESI) calcd for C22H19O2N3Cl (M++H): 392.1160; found: 392.1158.
2-(-4-(2-(3,5-Bis(trifluoromethyl)phenyl)-2-hydroxyethyl)-1,2,3-triazol-1-yl)-4-chlorophenol (1ja):
Isolated by column chromatography (pet.ether/AcOEt=6:4, R71 =0.3). The title compound was determined as colourless solid (87%). Mp: 181-183° C.; 1H NMR (200 MHz, CDCl3+MeOH (D4)): δ 3.22 (d, J=6.4 Hz, 2H), 5.19 (t, J=6.4 Hz, 1H), 7.02 (d, J=8.8 Hz, 1H), 7.26 (dd, J=2.7, 8.6 Hz, 1H), 7.76 (d, J=2.7 Hz, 1H), 7.79 (bs, 2H), 7.90 (bs, 2H), 8.17 (s, 1H) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)): δ 34.8 (t), 72.1 (d), 117.7 (d), 120.5 (s), 120.6 (d, J=4.0 Hz), 123.5 (d, 2C), 123.9 (s, 2C), 124.2 (d), 124.6 (s), 125.7 (d, J=2.9 Hz), 129.1 (d), 130.6 (s, d, J=33.3 Hz ), 131.6 (s, d, J=33.3 Hz), 142.8 (s), 146.7 (s), 147.5 (s) ppm; IR(cm−1): 3316, 3097, 2400, 1645, 1563, 1438, 1321, 1220, 1042, 867, 751, 660; HRMS(ESI) calcd for C18H13O2N3CIF6 (M++H): 452.0595; found: 452.0600.
2-(4-(2-(3,5-Bis(trifluoromethyl)phenyl)-2-hydroxyethyl)-1H-1,2,3-triazol-1-yl)-5-chlorophenol (1jb):
Isolated by column chromatography (pet.ether/AcOEt=6:4, Rƒ=0.3). The title compound was determined as colourless solid (82%). Mp: 192-194° C.; 1H NMR (200 MHz, CDCl3+MeOH (D4)): δ 3.21 (d, J=6.4 Hz, 2H), 5.19 (t, J=6.3 Hz, 1H), 6.98 (dd, J=2.2, 8.6 Hz, 1H), 7.08 (d, J=2.2 Hz, 1H), 7.60 (d, J=8.6 Hz, 1H), 7.79 (bs, 2H), 7.88 (bs, 2H), 8.09 (bs, 1H) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)): δ 34.9 (t), 71.2 (d), 116.7 (d), 119.6 (d, 2C), 120.3 (s), 120.6 (d, t, J=3.3 Hz), 122.9 (s), 124.8 (d, 2C), 125.8 (d, J=3.3 Hz), 130.3 (s, d, J=33.3 Hz ), 131.6 (s, d, J=32.9 Hz), 134.7 (s, 2C), 146.7 (s, 2C), 149.7 (s) ppm; IR(cm−1): 3298, 3161, 2984, 1645, 1599, 1443, 1309, 1211, 1095, 871, 757, 682; HRMS(ESI) calcd for C18H13O2N3CIF6 (M++H): 452.0595; found: 452.0599.
2-(4-(2-(3,5-Bis(trifluoromethyl)phenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)-4-chlorophenol (2sa):
Isolated by column chromatography (pet.ether/AcOEt=6:4, Rƒ=0.4). The title compound was determined as colourless solid (85%). Mp: 1642-166° C.; 1H NMR (200 MHz, CDCl3+MeOH (D4)): δ 1.67 (s, 3H), 3.30 (s, 2H), 7.00 (d, J=8.8 Hz, 1H), 7.24 (dd, J=2.5, 8.8 Hz, 1H), 7.69 (d, J=2.5 Hz, 1H), 7.76 (bs, 1H), 7.97 (s, 2H), 8.08 (s, 1H) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)): δ 28.1 (q), 39.4 (t), 72.7 (s), 117.7 (d), 119.9 (d, J=4.0 Hz), 120.3 (s), 123.4 (d, 2C), 123.9 (s, 2C), 124.5 (d), 125.1 (d, d, J=2.9 Hz), 125.7 (s), 129.1 (d), 130.7 (s, d, J=32.9 Hz), 143.2 (s, 2C), 147.7 (s) 150.3 (s) ppm; IR(cm−1): 3453, 3152, 2993, 1640, 1600, 1555, 1437, 1363, 1248, 1160, 1023, 983, 871, 764; HRMS(ESI) calcd for C19H15O2N3CIF6 (M++H): 466.00752; found: 466.0755.
2-(4-(2-(3,5-Bis(trifluoromethyl)phenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)-5-chlorophenol (2sb):
Isolated by column chromatography (pet.ether/AcOEt=6:4, Rƒ=0.4). The title compound was determined as colourless solid (80%). Mp: 156-158° C.; 1H NMR (200 MHz, CDCl3MeOH (D4)): δ1.68 (s, 3H), 3.29 (s, 2H), 6.96 (dd, J=2.2, 8.6 Hz, 1H), 7.07 (d, J=2.2, 1H), 7.58 (d, J=8.6 Hz, 1H), 7.76 (bs, 1H), 7.97 (s, 2H), 8.01 (s, 1H) ppm; 13C NMR (50 MHz, CDCl3+MeOH (D4)): δ 28.1 (q), 39.4 (t), 72.8 (s), 116.6 (d), 119.4 (d), 119.9 (d, J=4.0 Hz), 120.3 (s), 122.9 (s), 124.6 (d), 124.8 (d, 2C), 125.1 (d, d, J=2.9 Hz), 125.7 (s), 130.1 (s, d, J=32.9 Hz), 131.4 (s, d, J=32.9 Hz), 134.6 (s), 142.2 (s), 149.6 (s), 150.2 (s) ppm; IR(cm−1): 3322, 3129, 2983, 1633, 1600, 1535, 1427, 1363, 1248, 1170, 1027, 989, 878, 754; HRMS(ESI) calcd for C19H15O2N3CIF6 (M++H): 466.00752; found: 466.0750.
4-Chloro-2-(4-(2-(2,4-difluorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)phenol (2ka)
Brown color solid; 82%; (ƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (200 MHz, {MeOD+CDCl3}): δ 1.60 (d, J=1.0 Hz, 3H), 3.26 (d, J=14.9 Hz, 1H), 3.44 (d, J=14.8 Hz, 1H), 6.64-6.78 (m, 2H), 6.93 (d, J=8.8 Hz, 1H), 7.15 (dd, J=8.8, 2.5 Hz, 1H), 7.40-7.54 (m, 2H), 7.76 (s, 1H); 13C NMR (125 MHz, {MeOD+CDCl3}): δ 27.4 (q), 37.4 (t), 72.1 (s), 103.5 (dd, J=25.7, 27.7 Hz), 110.1 (dd, J=2.9, 20.0 Hz), 117.8 (d), 123.2 (d), 124.0 (s), 124.1 (d), 124.6 (s), 128.2 (dd, J=6.5, 9.5 Hz), 129.0 (d), 129.3 (s), 143.0 (s), 147.4 (s), 157.8 (s), 159.8 (s), 160.7 (s), 162.6 (s) ppm; HRMS (ESI+): calcd. For C17H14CIF2N3O2 [M+H]+ 365.0743; found 366.0816.
4-Chloro-2-(4-(2-(2,4-dichlorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)phenol (2 ma):
Orange color solid; 81%; (Rƒ=0.3, 30% ethyl acetate/pet. ether); 1H NMR (500 MHz, {MeOD+CDCl3}): δ 1.92 (s, 3H), 3.64 (d, J=14.9 Hz, 1H, 3.87 (d, J=14.9 Hz, 1H), 7.10 (dd, J=8.9, 2.1 Hz, 1H), 7.20 (d, J=2.1 Hz, 1H), 7.35 (dd, j=8.5, 2.1 Hz, 1H), 7.53 (d, J=2.1 Hz, 1H), 7.71 (d, J=8.5 Hz, 1H), 7.86 (d, J=8.5 Hz, 1H), 8.09 (br. s., 1H); 13C NMR (125 MHz, {MeOD+CDCl3}): δ 26.1 (q), 35.7 (t), 73.4 (s), 116.5 (d), 119.3 (d), 122.9 (s), 124.6 (d), 126.2 (d), 128.9 (d), 129.9 (d), 130.7 (s), 132.6 (s), 134.4 (s), 142.0 (s), 149.5 (s) ppm; HRMS (ESI+): calcd. For C17H14Cl3N3O2 [M+H]+ 397.0152; found 398.0224.
4-Chloro-2-(4-(2-(4-(dimethylamino)phenyl)-2-hydroxyethyl)-1H-1,2,3-triazol-1-yl)phenol (2pa):
Brown color solid; 84%; (Rƒ=0.3, 35% ethyl acetate/pet.ether); 1H NMR (200 MHz, {MeOD+CDCl3}): δ 3.28 (s, 6H), 3.51-3.59 (m, 2H), 5.22-5.34 (m, 1H), 7.11 (d, J=8.8 Hz, 2H), 7.35 (d, J=8.7 Hz, 1H), 7.56 (d, J=2.5 Hz, 1H), 7.58-7.61 (m, 1H), 7.62 (d, J=3.4 Hz, 1H), 8.02 (d, J=2.4 Hz, 1H), 8.37 (s, 1H); 13C NMR (125 MHz, {MeOD+CDCl3}): 535.0 (t), 40.6 (q, 2C), 72.6 (s), 112.7 (d, 2C), 118.8 (d), 122.6 (d), 123.0 (s), 124.5 (s), 126.7 (d, 2C), 127.5 (d), 129.3 (d), 147.7 (s), 150.1 (s) ppm; HRMS (ESI+): calcd. For C18H19CIN4O2[M-H2O]+ 358.1197; found 341.1159.
5-Chloro-2-(4-(2-(2,4-difluorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)phenol (2kb):
Brown color solid; 81%; (Rƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (500 MHz, {MeOD+CDCl3}): δ 1.59 (s, 3H), 3.26 (d, J=14.9 Hz, 1H), 3.41 (d, J=14.9 Hz, 1H), 6.65-6.74 (m, 2H), 6.85 (dd, J=8.6, 2.1 Hz, 1H), 6.98 (d, J=1.9 Hz, 1H), 7.38 (d, J=8.4 Hz, 1H), 7.42-7.49 (m, 1H), 7.73 (s, 1H) ppm; 13C NMR (125 MHz, {MeOD+CDCl3}): δ 28.2 (q), 37.4 (t), 72.8 (s), 103.7 (s), 103.9 (dd, J=26.1, 27.7 Hz), 110.6 (s), 110.7 (dd, J=3.4, 20.20 Hz), 117.8 (d), 120.1 (d), 122.6 (s), 123.0 (d), 123.6 (d), 128.5 (s), 134.8 (s), 143.6 (s), 149.7 (s), 157.9 (s), 159.8 (s), 160.9 (s), 162.9 (s) ppm; HRMS (ESI+): calcd. For C17H14CIF2N3O2 [M+H]+ 365.0743; found 366.0814.
5-Chloro-2-(4-(2-(2,4-dichlorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)phenol (2mb):
Orange color solid; 83%; (Rƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (400 MHz, {MeOD+CDCl3}): δ 1.68 (s, 3H), 3.34 (d, J=15.1 Hz, 1H), 3.78 (d, J=14.7 Hz, 1H), 6.9 (dd, J=8.7, 2.3 Hz, 1H), 6.97 (d, J=2.3 Hz, 1H), 7.09 (dd, J=8.7, 2.3 Hz, 1H), 7.26 (d, J=2.3 Hz, 1H), 7.37 (d, J=8.7 Hz, 1H), 7.61 (d, J=8.7 Hz, 1H), 7.71 (s, 1H); 13C NMR (100 MHz, {MeOD+CDCl3}): δ 27.0 (q), 35.9 (t), 74.3 (s), 117.8 (d), 120.1 (d), 122.7 (s), 123.6 (d), 126.9 (d), 129.4 (d), 130.5 (d), 130.9 (s), 133.2 (s), 134.8 (s), 142.0 (s), 149.7 (s) ppm; HRMS (ESI+): calcd. For C17H14Cl3N3O2 [M+]+ 397.0152; found 398.0225.
5-Chloro-2-(4-(2-(2-fluoro-4-(trifluoromethyl)phenyl)-2-hydroxyethyl)-1H-1,2,3-triazol-1-yl)phenol (2ob):
Brown color solid; 83%; (Rƒ=0.3, 35% ethyl acetate/pet.ether); 1 NMR (400 MHz, {MeOD+CDCl3}): δ 3.0 (d, J=8.3 Hz, 1H), 3.07-3.16 (m, 1H), 4.92 (br. s., 1H), 5.24 (br. s., 1H), 6.76-6.82 (m, 1H), 6.95-7.00 (m, 1H), 7.13 (d, J=9.8 Hz, 1H), 7.28 (br. s., 1H), 7.45 (dd, J=8.7, 2.8 Hz, 1H), 7.55-7.62 (m, 1H), 7.94 (br. s., 1H), 10.06 (br. s., 1H); 13C NMR (100 MHz, {MeOD+CDCl}): δ 29.3 (q), 33.9 (t), 66.1 (d), 112.2 (d, J=24.6 Hz), 117.5 (d), 119.7 (d), 120.7 (d), 123.1 (s), 123.3 (s), 124.2 (d), 128.1 (d), 128.2 (s), 134.3 (s), 149.6 (s), 157.4 (s), 159.9 (s) ppm; HRMS (ESI+): calcd. For C17H12CIF4N3O2 [M+H]+401.0554; found 402.0621.
2-(4-(2-(2,4-Difluorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)-5-fluorophenol (2kc):
Brown color solid; 81%; (Rƒ=0.3, 35% ethyl acetate/pet.ether); 1H NMR (200 MHz, {MeOD+CDCl3}): δ 1.66 (s, 3H), 3.33 (d, J=14.9 Hz, 1H), 3.52 (d, J=14.9 Hz, 1H), 6.64-6.86 (m, 2H), 6.88-7.09 (m, 2H), 7.14-7.36 (m, 1H), 7.40-7.65 (m, 111), 7.85 (s, 1H); 13C NMR (50 MHz, {MeOD+CDCl3}): δ 28.4 (q), 37.4 (t), 72.8 (s), 104.0 (dd, J=25.3, 27.4 Hz), 108.3 (d), 108.8 (d), 110.8 (dd, J=3.3, 20.5 Hz), 116.0 (d), 116.4 (d), 119.1 (d, J=8.42 Hz), 122.2 (d), 128.6 (dd, J=6.2, 9.5 Hz), 129.4 (s), 143.9 (s), 145.0 (s), 153.4 (s), 158.2 (s) ppm; HRMS (ESI+): calcd. For C17H14F3N3O2 [M+H]+ 349.1038; found 350.1104.
2-(4-(2-(2,4-Dichlorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)-5-fluorophenol (2mc):
Orange color solid; 86%; (Rƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (200 MHz, {MeOD+CDCl3}): δ 2.3 (s, 3H), 4.03 (d,J=15.0 Hz, 1H), 4.36 (d, J=15.0 Hz, 1H), 7.50-7.58 (m, 2H), 7.74 (dd, J=8.6, 2.3 Hz, 1H), 7.88-8.00 (m, 2H), 8.26 (d, J=8.6 Hz, 1H), 8.6 (s, 1H); 13C NMR (50 MHz, {MeOD+CDCl3}): δ 26.6 (q), 35.9 (t), 73.9 (s), 109.7 (d), 110.2 (d), 115.6 (d), 116.1 (d), 117.9 (d, J=8.4 Hz, ), 123.7 (d), 126.6 (d), 129.1 (d), 130.3 (d), 130.9 (s), 132.9 (s), 142.0 (s), 143.2 (s), 144.8 (s), 153.1 (s), 157.9 (s) ppm; HRMS (ESI+): calcd. For C17H14F3N3O2 [M+H]+ 381.0447; found 382.0515.
5-Fluoro-2-(4-(2-(2-fluoro-4-(trifluoromethyl)phenyl)-2-hydroxyethyl)-1H-1,2,3-triazol-1-yl)phenol (2oc):
Brown color solid; 79%; (Rƒ=0.3, 35% ethyl acetate/pet.ether); 1H NMR (500 MHz, {MeOD+CDCl3}): δ 3.12 (dd, J=8.2, 14.9 Hz, 1H), 3.15 (dd, J=4.3, 14.9 Hz, 1H), 5.26 (dd, J=4.3, 7.9 Hz, 1H), 6.96 (d, J=2.6 Hz, 1H), 6.90 (d, J=2.0 Hz, 1H), 7.26 (d, J=10.1 Hz, 1H), 7.32 (br. s., 2H), 7.39-7.41 (m, 2H), 7.64 (t, J=7.6 Hz, 1H), 8.09 (s, 1H); 13C NMR (125 MHz, {MeOD+CDCl3}): δ 33.4 (t), 65.0 (d), 109.9 (d), 110.2 (d), 112.5 (d), 116.0 (d), 116.2 (d), 118.1 (d, J=9.1 Hz), 121.0 (t, J=3.6 Hz), 123.5 (d), 128.1 (d, J=4.5 Hz, 1C), 135.0 (s), 143.5 (s), 144.9 (s), 154.7 (s), 156.6 (s), 157.9 (s), 159.9 (s) ppm; HRMS (ESI+): calcd. For C17H14F3N3O2 [M+H]+ 385.0850; found 386.0917.
5-Fluoro-2-(4-(2-(4-fluorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)phenol (2qc):
Brown color solid; 83%; (Rƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (500 MHz, {MeOD+CDCl3}): δ 1.54 (s, 3H), 3.21 (s, 2H), 6.87-7.00 (m, 4H), 7.29 (s, 1H), 7.32-7.42 (m, 2H), 7.76 (s, 1H); 13C NMR (125 MHz, {MeOD+CDCl3}): δ 29.3 (q), 39.9 (t), 73.4 (s), 109.7 (dd, J=27.7 Hz), 114.6 (dd, J=21.0 Hz, 2C), 116.1 (dd, J=22.9 Hz), 118.3 (dd, J=8.6 Hz), 123.5 (d), 126.5 (dd, J=8.6 Hz, 2C), 142.8 (s), 144.9 (s), 154.7 (s), 156.6 (s), 160.5 (s), 162.5 (s) ppm; HRMS (ESI+): calcd. For C17H15F3N3O2 [M+H]+ 331.1132; found 332.1199.
2-(4-(2-(4-Chlorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)-5-fluorophenol (21c):
Light orange color solid; 82%; (Rƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (200 MHz, {MeOD+CDCl3}): δ 1.53 (s, 3H), 3.20 (s, 2H), 6.94 (d, J=5.8 Hz, 2H), 7.30 (s, 2H), 7.25 (s, 1H), 7.31-7.38 (m, 2H), 7.80 (s, 1H); 13C NMR (125 MHz, {MeOD+CDCl3}): δ 29.6 (q), 39.7 (t), 73.5 (s), 109.2 (m, 1C), 116.1 (d, J=22.7 Hz), 118.7 (d, J=8.2 Hz), 122.9 (d), 123.6 (s), 126.3 (d, 2C), 128.1 (d, 2C), 132.4 (s), 143.6 (s), 145.0 (s), 145.7 (s), 154.8 (s) ppm; HRMS (ESI+): calcd. For C17H15CIFN3O2 [M+H]+ 347.0837; found 348.0903.
2-(4-(2-(4-Bromophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)-5-fluorophenol (2nc):
Brown color solid; 83%; (Rƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (200 MHz, {MeOD+CDCl3}): δ 1.63 (s, 3H), 3.32 (d, J=1.6 Hz, 2H), 6.97-7.06 (m, 2H), 7.10-7.17 (m, 1H), 7.30-7.38 (m, 2H), 7.41-7.49 (m, 2H), 7.68 (s, 1H), 9.62 (s, 1H); 13C NMR (50 MHz, {MeOD+CDCl3}): δ 29.4 (q), 39.6 (t), 73.5 (s), 109.1 (d), 109.6 (d), 115.9 (d), 116.4 (d), 118.5 (dd, J=8.8 Hz), 120.5 (s), 123.1 (d), 126.7 (d, 2C), 131.1 (d, 2C), 1.43.5 (s), 146.2 (s) ppm; HRMS (ESI+): calcd. For C17H13BrFN3O2 [M+H]+ 391.0332; found 392.0398.
4-Chloro-2-(4-(2(4fluorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)phenol (2qa):
Brown color solid; 79%; (Rƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (200 MHz, {MeOD+CDCl3}): δ 1.6 (s, 3H), 3.21 (s, 3H), 6.90-6.99 (m, 3H) 7.17 (dd, J=8.8, 2.5 Hz, 1H), 7.33 7.42 (m, 2H), 7.59 (d, J=2.5 1H), 7.77 (s, 1H); 13C NMR (50 MHz, {MeOD+CDCl3}): δ 29.0 (q), 39.9 (t), 73.3 (s), 114.2 (d), 114.7; (d). 118.3 (d), 123.1 (d), 124.3 (s), 126.4 (d, 2C), 126.5 (d, 2C), 129.3 (d, 2C). 142.7 (s). 147.5 (s) ppm; HRMS (ESI+): calcd. For C17H15CIFN3O2 [M+H]+ 347.0837; found 348.0904.
4-Chloro-2-(4-(2-(4-chlorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)phenol (21a):
Orange color solid; 82%; (Rƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (400 MHz, {MeOD+CDCl3}): δ 1.54 (s, 3H) 3.21 (s, 2H), 6.94 (m, 3H), 7.59 (d, J=2.5 Hz, 1H), 7.81 (br. s., 1H); 13C NMR (101 MHz, {MeOD+CDCl3}): δ 29.0 (q), 39.6 (t). 73.3 (s), 118.3 (d) 123.2 (d) 123.9 (s), 124.3 (s), 124.6 (s), 126.3 (d, 2C). 127.9 d, 3C), 129.3 (d), 132.2 (s), 145.6 (s), 147.6 (s) ppm; HRMS (ESI+): calcd. For C17H15CIFN3O2 [M+H]+ 363.0541: found 364.0809.
2-(4-(2-(4-Bromophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)-4-chlorophenol (2na):
Brown color solid; 83%; (Rƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (200 MHz, {MeOD+CDCl3}): δ 1.52 (s, 3H), 3.20 (s, 2H), 6.93 (d, J=8.8 Hz, 1H), 7.11-7.42 (m, 5H), 7.52 (d, J=2.5 Hz, 1H), 7.77 (s, 1H); 13C NMR (50 MHz, {MeOD+CDCl3}): δ 29.3 (q), 39.6 (t), 73.5 (s), 118.8 (d), 120.5 (s), 122.7 (d), 123.4 (d), 124.4 (s), 124.5 (s), 126.7 (d, 2C), 129.4 (d), 131.0 (d, 2C), 146.2 (s, 2C), 147.6 (s) ppm; HRMS (ESI+): calcd. For C17H15CIFN3O2 [M+H]+ 407.0036; found 408.0136.
5-Chloro-2-(4-(2-(4-fluorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)phenol (2qb):
Brown color solid; 81%; (Rƒ=0.3, 30% ethyl acetate/pet.ether);1H NMR (200 MHz, {MeOD+CDCl3}): δ 1.55 (s, 3H), 3.20 (s, 2H), 6.87 (d, J=2.2 Hz, 1H), 6.90-6.92 (m, 1H), 6.94 (s, 1H), 6.97-7.00 (m, 2H), 7.32-7.40 (m, 2H), 7.46 (d, J=8.6 Hz, 1H), 7.69 (br. s., 1H); 13C NMR (50 MHz, {MeOD+CDCl3}): δ 24.6 (q), 35.3 (t), 68.7 (s), 109.7 (d, J=21.2 Hz, 2C), 112.8 (d), 115.3 (d), 119.6(d, 2C), 121.8 (d, J=8.1 Hz, 2C), 130.2 (s), 138.2 (s), 145.1 (s, 2C), 154.4 (s), 161.9 (s) ppm; HRMS (ESI+): calcd. For C17H15CIFN3O2 [M+H]+ found 348.0906.
5-Chloro-2-(4-(2-(4-chlorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)phenol (21b):
Orange color solid; 83%; (Rƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (400 MHz, {MeOD+CDCl3}): δ 51.53 (s, 3H), 3.20 (s, 2H), 6.89 (dd, J=8.7, 2.1 Hz, 1H), 7.00 (d, J=2.2 Hz, 1H), 7.22 (m, J=8.8 Hz, 2H), 7.30-7.36 (m, 2H), 7.45 (d, J=8.6 Hz, 1H), 7.72 (s, 1H); 13C NMR (101 MHz, {MeOD+CDCl3}): δ 29.2 (q), 39.7 (t), 73.4 (s), 117.5 (d), 120.0 (d), 122.9 (s), 124.2 (d), 126.3 (d, 2C), 128.0 (d, 3C), 132.3 (s), 134.8 (s), 145.7 (s, 2C), 149.7 (s) ppm; HRMS (ESI+): calcd. For C17H15Cl2N3O2 [M+H]+ 363.0541 ; found 364.0610.
2-(4-(2-(4-Bromophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)-5-chlorophenol (2nb):
Brown color solid; 81%; (Rƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (200 MHz, {MeOD+CDCl3}): δ 1.53 (s, 3H), 3.20 (s, 2H), 6.89 (dd, J=8.6, 2.2 Hz, 1H), 7.00 (d, J=2.2 Hz, 1H), 7.26-7.33 (m, 2H), 7.36 (s, 1H), 7.40 (m, 1H), 7.47 (d, J=8.6 Hz, 1H), 7.74 (s, 1H); 13C NMR (50 MHz, {MeOD+CDCl3}): δ 29.3 (q), 39.6 (t), 73.5 (s), 117.7(d), 120.1 (d), 120.5 (s), 123.9(d), 126.7 (d, 2C), 131.0 (d, 2C), 134.9 (s), 146.2 (s, 2C), 149.7 (s, 2C), 154.7 (s) ppm; HRMS (ESI+): calcd. For C17H15Cl2N3O2 [M+H]+ 407.0036; found 408.0136.
2-(4-(2-(4-Fluorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)phenol (2qd):
Brown color solid; 78%; (Rƒ=0.3, 30% ethyl acetate/pct.ether); 1H NMR (200 MHz, {MeOD+CDCl3}): δ 1.55 (s, 3H), 3.21 (s, 2H), 6.84-7.05 (m, 4H), 7.14-7.28 (m, 1H), 7.30-7.48 (m, 3H), 7.66 (s, 1H); 13C NMR (50 MHz, {MeOD+CDCl3}): δ 29.4 (q), 39.9 (t), 73.4 (s), 114.6 (d, J=21.2Hz, 2C), 117.8 (d), 119.9 (d), 122.6 (d), 123.1 (d), 123.7 (s), 126.4 (d, J=7.7 Hz, 2C), 129.7 (d), 142.8 (s), 149.0 (s, 2C), 159.1 (s), 163.9 (s) ppm; HRMS (ESI+): calcd. For C17H15Cl2N3O2[M+H]+ 313.1227; found 314.1294.
2-(4-(2-(4-Chlorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)phenol (21d):
Orange color solid; 84%; (Rƒ=0.3, 30% ethyl acctatc/pct.ether); 1H NMR (500 MHz, {MeOD+CDCl3}): δ 1.56 (br. s., 3H), 3.22 (br. s., 2H), 6.89 6.97 (m, 1H), 7.00 (d, J =7.6 Hz, 1H), 7.20-7.31 (m, 3H), 7.38 (d, J=7.3 Hz, 2H), 7.54 (d, J=7.0 Hz, 1H), 7.83 (br. s., 1H); 13C NMR (125 MHz, {MeOD+CDCl3}): δ 528.4 (q), 39.6 (t), 72.9 (s), 116.7(d), 119.4 (d), 123.6 (d), 123.9 (s), 124.2 (d), 126.1 (d, 2C), 127.6 (d, 2C), 129.5 (d), 131.9 (s), 142.7 (s), 145.6 (s, 2C), 148.9 (s) ppm; HRMS (ESI+): calcd. For C17H15Cl2N3O2[M+H]+ 329.0931; found 330.0998.
2-(4-(2-(4-Bromophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)phenol (2nd):
Brown color solid; 84%; (Rƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (200 MHz, {MeOD+CDCl3}): δ 1.53 (s, 3H), 3.21 (s, 2H), 6.86-6.96 (m, 1H), 6.97-7.04 (m, 1H), 7.16-7.24 (m, 1H), 7.27-7.33 (m, 2H), 7.34-7.46 (m, 3H), 7.71 (s, 1H); 13C NMR (50 MHz, {MeOD+CDCl3}): δ 29.3 (q), 39.6 (t), 73.4 (s), 117.8 (d), 120.0 (d), 120.4 (s), 122.6 (d), 123.1 (d), 126.7 (d, 2C), 129.7 (d), 131.0 (d, 2C), 146.3 (s, 2C), 149.0 (s, 2C), 160.9 (s) ppm; HRMS (ESI+): calcd. For C17H15Cl2N3O2[M+H]+ 373.0426; found 374.0495.
2-(4-(2-(2,4-Difluorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)phenol (2kd):
Brown color solid; 82%; (Rƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (200 MHz, {MeOD+CDCl3}): δ 1.68 (s, 3H), 3.38 (s, 1H), 3.47 (s, 1H), 6.70-6.87 (m, 2H), 6.92-7.10 (m, 2H), 7.23-7.36 (m, 1H), 7.43-7.62 (m, 2H), 7.82 (s, 1H); 13C NMR (50 MHz, {MeOD+CDCl3}): δ 28.2 (q), 37.4 (t), 72.7 (s), 103.3 (dd, J=25.6, 27.4 Hz)), 110.6 (dd, J=3.3, 23.8 Hz), 117.8 (d), 119.9 (d), 122.5 (d), 122.9 (d), 123.7 (s), 128.4 (dd, J=6.4, 9.1 Hz), 129.7 (d), 149.0 (s, 2C), 156.3 (s), 159.2 (s), 161.4 (s) ppm; HRMS (ESI+): calcd. For C17H15Cl2N3O2[M+H]+ 331.1132; found 332.1 199.
2-(4-(2-(2,4-Dichlorophenyl)-2-hydroxypropyl)-1H-1,2,3-triazol-1-yl)phenol (2md):
Brown color solid; 81 %; (Rƒ=0.3, 30% ethyl acetate/pet.ether); 1H NMR (200 MHz, {MeOD+CDCl3}): δ 1.71 (s, 3H), 3.39 (d, J=15.0 Hz, 1H), 3.77 (d, J=14.9 Hz, 1H), 6.86-7.03 (m, 2H), 7.09-7.25 (m, 2H), 7.28-7.34 (m, 1H), 7.44 (dd, J=8.0, 1.6 Hz, 1H), 7.64 (d, J=8.6 Hz, 1H), 7.78 (s, 1H); 13C NMR (50 MHz, {MeOD+CDCl3}): δ 26.8 (q), 35.9 (t), 74.1 (s), 117.5 (d), 119.8 (d), 122.8 (d), 123.1 (d), 126.8 (d), 129.3 (d), 129.6 (d), 130.4 (d), 130.9 (s), 133.0 (s), 142.1 (s), 148.9 (s, 2C), 151.6 (s) ppm; HRMS (ESI+): calcd. For C17H15Cl2N3O2[M+H]+ 363.0541 ; found 364.061 1.
The synthesized compounds were evaluated for antifungal susceptibility by microbroth dilution method according to the recommendations of the Clinical Laboratory Standards Institute (CLSI 2008). Briefly, appropriate amount of compounds were dissolved in dimethyl sulfoxide to get 100× final strength. The stock was then diluted 1:50 in RPMI/YPG medium and 200 μl from this was added to the first row of a 96-well microtitre plate. The compounds were serially diluted two fold in successive wells to get a range of 1-128 μg/ml. Fungal yeast cells (˜2×103 cfu/mL), freshly grown in YPG broth in logarithmic phase, were suspended in the medium and inoculated (100 μl) in the wells of the plate. For filamentous fungi, 2×104 spores/mL were added. The microtitre plate was incubated for 48 h, and the absorbance was measured at 600 nm by using microtitre plate reader to assess cell growth. The MIC was defined as the lowest concentration exhibiting >90% inhibition of visible growth compared to the growth of the control. Results are given in Table 1. Based on the results, compounds 2gb, 2ga, 1db, 2fa, 1ab, 2eb, 2ea, 1da, 1db were identified as promising molecules.
B. Effect of the compounds on sterol profile:
Inhibition of lanosterol 14 a-demethylase by azoles results in depletion of ergosterol. The depletion can be quantified by spectrophotometry. Briefly, Overnight grown C. albicans ATCC 24433 (1×106 cfu/ml) cells were inoculated in a series of flasks containing 50 ml of Yeast extract Peptone Glucose (YPG) broth containing 0, 0.5, 1, 2 mg of fluconazole per ml as well as 0.5 MIC and MIC of the lead compounds. The cultures were incubated for 24 h with shaking at 30° C. The stationary-phase cells were harvested by centrifugation at for 5 min and washed once with sterile distilled water. The net wet weight of the cell pellet was determined. Three milliliters of 25% alcoholic potassium hydroxide solution (25 g of OH and 35 ml of sterile distilled water, brought to 100 ml with 100% ethanol), was added to 125 mg of pellet and vortex mixed for 1 min. Cell suspensions were transferred to sterile borosilicate glass screw-cap tubes and were incubated in an 85° C. water bath for 1 h. Following incubation, tubes were allowed to cool to room temperature. Sterols were then extracted by addition of a mixture of 1 ml of sterile distilled water and 3 ml of n-heptane followed by vigorous vortex mixing for 3 min. The heptane layer was transferred to a clean borosilicate glass screw-cap tube. The sterol extract was scanned spectrophotometrically between 220 and 300 nm with a Spectrophotometer. The presence of ergosterol and the late sterol intermediate 24(28)DHF in the extracted sample resulted in a characteristic four-peaked curve. A dose-dependent decrease in the height of the absorbance peaks was evident and corresponded to decreased ergosterol concentration for fluconazole and all the tested compounds. Compounds 2fa and 2gb were most effective. The sterol profile for negative control compounds lab and 2fa was similar to control. Based on the results, compounds 2ca, 1da and 2ga were identified as potent inhibitors of lanosterol 14 α-demethylase enzyme, exerting their antifungal action through ergosterol depletion.
For compounds 2cb, 1da, 2fa, 1ab no ergosterol depletion was observed indicating different mode of action. Apart from lanosterol 14 a-demethylase inhibition, few azoles like miconazole are known to exert their antifungal action by reactive oxygen species (ROS) generation. Therefore ROS production in C. albicans ATCC 24433 was evaluated for these compounds by using dichlorofluorescin diacetate dye. Compounds 2fa, 2eb, 1da, 1ab showed dose dependent increase in ROS generation in C. albicans ATCC 24433. ROS can damage a wide range of molecules, including nucleic acids, proteins and lipids, can cause apoptosis, necrotic death and with this wide range of targets it is difficult to determine which events lead to loss of viability of cells following damage.
Candida
Candida
Cryptococcus
Aspergillus
Aspergillus
albicans
albicans
Candida
neoformans
fumigatus
niger
glabrata
C. albicans
C. neoformans
C. glabrata
A. niger
A. fumigatus
C. albicans
C. tropicalis
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative examples and that the present invention may be embodied in other specific forms without departing from the essential attributes thereof, and it is therefore desired that the present embodiments and examples be considered in all respects as illustrative and not restrictive, reference being made to the appended claims, rather than to the foregoing description, and all changes which come within the meaning and range of equivalency of the claims arc therefore intended to be embraced therein.
| Number | Date | Country | Kind |
|---|---|---|---|
| 1660/DEL/2014 | Jun 2014 | IN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/IN2015/000249 | 6/18/2015 | WO | 00 |
