Patent Application
20230085692
The present disclosure is directed to novel derivatives of naturally occurring cannabinoids, methods of making them, compositions comprising them, and methods for using them.
Natural products are a sought-after source of industrially useful chemicals because of their biorenewability. Industrial chemicals derived from natural gas, petroleum, and other non-renewable sources are increasingly frowned upon because of the effect on the environment from their extraction as well as due to their limited nature and increasing costs associated with extraction. In contrast, the use of naturally occurring biological feedstocks effectively provides a solar-energy empowered source of chemical precursors and fuels for industry. Plants which are rapidly growing and provide high concentrations of useful biochemical feedstocks are particularly important.
For example, terpenes and terpene derivatives are a diverse, commercially sought after, and industrially important classes of natural products. Terpenes occur in all organisms and are particularly prevalent in plants, from which they are industrially isolated. The ready commercial access and low-cost of terpenes continually drives innovation into their chemical derivatization which find use in polymer science, the flavor & fragrance industry, the cosmetic industry, the pharmaceutical industry, and as surfactants, plastic additives, and other industrial uses.
However, there remains a need for new sources of natural chemical feedstocks that can supplement or replace terpenes and other currently known biofeedstocks.
Cannabis plants are a well-known genus of flowering plants in the family Cannabaceae. There are at least three commonly recognized species within the family, Cannabis sativa, Cannabis indica, and Cannabis ruderalis. Also known as hemp, this plant family has long been used for its fiber, and for the raw oils derived from its seeds and leaves. These natural products have been used to make juices for consumption, medicines, and for recreational drug use. Indeed, Cannabis is often considered synonymous with hashish, hash oil, marijuana, and other recreational drug products. However, the active psychotropic agent in Cannabis plants, tetrahydrocannabinol, is just one of more than 100 structurally related “cannabinoid” compounds present in the stems, leaves, seeds and other parts of Cannabis plants. Importantly, several strains of Cannabis have been developed which have minimal THC content.
The most common cannabinoid compounds which have been studied include the following classes, each of which includes several stereoisomers and variations:
These four classes include the following compounds:
Both the tricyclic ring system and the pentyl side chain of the cannabinol skeleton are important to the euphoric psychoactive effect of cannabinoids. THC and its double bond isomers are potently psychoactive, while CBN is only mildly psychoactive, and the related compounds cannabivarin and tetrahydrocannabivarin are considered not to be psychoactive, although THCV has been studied for other potentially useful medicinal properties:
Cannabis species are one of the fastest growing plants, and it has been used to provide fibers for materials and building uses, as well as extracts which have found many uses. Cannabis species are currently grown on a wide scale, and as legal restrictions ease, it is expected that the industry will expand substantially. Extracts derived from parts of the Cannabis plant can have high concentrations of cannabinoids, depending on the extraction method and cultivar.
There exists already a large significant chemical industry based on renewable, biologically derived source materials. For example, numerous lubricants, solvents (e.g., vegetable oils), and fibrous materials are derived from wood, rags, and grasses. In addition, ethanol, sugars and starches are extracted from crops such as corn. However, many of these crops have the drawbacks, such as, long periods of growth to maturity, or competing use as human or animal foodstuffs.
There remains a need for a new, versatile, cheap, rapidly growing biological sources of industrial chemical feedstocks.
The present disclosure provides novel derivatives of naturally occurring cannabinoids, which can be used as chemical feedstocks for the production of novel large-volume industrial chemicals, such as, surfactants, emollients, lubricants, defoamers, adjuvants, fuels, and other ingredients especially useful in personal care compositions (e.g., soaps, hair care products), cosmetic compositions (e.g., sunscreens), household cleaning compositions (e.g., cleaning solutions and laundry detergents), crop care compositions (e.g., insecticides and herbicides), as well as polymer precursors and additives for plastics, paints, and coatings.
In a second aspect, the present disclosure provides a method of preparing such compounds.
In a third aspect, the present disclosure provides compositions and products comprising such compounds.
In a first aspect, the present disclosure provides a compound (Compound 1) which is a hydrogenated derivative of a cannabinoid. As used herein, the term “hydrogenated derivative” means that at least one exocyclic double bond and/or at least the central aromatic ring of the cannabinoid are hydrogenated, for example, to form a saturated exocyclic moiety and/or a saturated cyclohexane ring or a cyclohexene or cyclohexadiene ring, respectively.
In some embodiments of the first aspect, the compound is a hydrogenated derivative of a cannabinoid selected from cannabigerol, cannabichromene, cannabidiol, cannabinol, cannabigerolic acid, cannabichromenic acid, cannabidiolic acid, cannabinolic acid, tetrahydrocannabinol, and tetrahydrocannabinolic acid. In particular embodiments of the first aspect, the compound is a hydrogenated derivative of a cannabinoid selected from cannabigerol, cannabidiol, cannabinol, cannabigerolic acid, cannabidiolic acid, and tetrahydrocannabinol. In some embodiments the compound is hydrogenated and deoxygenated and/or decarboxylated.
In further embodiments of the first aspect, the present disclosure provides as follows:
is a group
is a group
and R4 is selected from C1-21alkyl, C2-21alkenyl, —C3-7cycloalkyl, and C1-6haloalkyl.
is a group
and R4 is selected from OC1-21alkyl, OC2-21alkenyl, OC3-7cycloalkyl, OC1-6haloalkyl.
is a group
and R4 is selected from C1-21alkyl, C2-21alkenyl, C3-7cycloalkyl, and C1-6haloalkyl.
is a group
and R4 is selected from C1-21alkyl, C2-21alkenyl, C3-7cycloalkyl, and C1-6haloalkyl.
The term “alkyl” as used herein refers to a monovalent or bivalent, branched or unbranched saturated hydrocarbon group having from 1 to 20 carbon atoms, typically although, not necessarily, containing 1 to about 12 carbon atoms, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, t-butyl, octyl, and the like. The term alkyl also may include cycloalkyl groups. Thus, for example, the term C6 alkyl would embrace cyclohexyl groups, the term C5 would embrace cyclopentyl groups, the term C4 would embrace cyclobutyl groups, and the term C3 would embrace cyclopropyl groups. In addition, as the alkyl group may be branched or unbranched, any alkyl group of n carbon atoms would embrace a cycloalkyl group of less than n carbons substituted by additional alkyl substituents. Thus, for example, the term C6 alkyl would also embrace methylcyclopentyl groups, or dimethylcyclobutyl or ethylcyclobutyl groups, or trimethylcyclopropyl, ethylmethylcyclopropyl or propylcyclopropyl groups.
The term “alkenyl” as used herein refers to a monovalent or bivalent, branched or unbranched, unsaturated hydrocarbon group typically although not necessarily containing 2 to about 12 carbon atoms and 1-10 carbon-carbon double bonds, such as ethylene, n-propylene, isopropylene, n-butylene, isobutylene, t-butylene, octylene, and the like. In like manner as for the term “alkyl”, the term “alkenyl” also embraces cycloalkenyl groups, both branched an unbranched with the double bond optionally intracyclic or exocyclic.
Unless otherwise specified, any carbon atom with an open valence may be substituted by an additional functional group. Examples of functional groups include, without limitation: halo, hydroxyl, sulfhydryl, C1-C20 alkoxy, C2-C20 alkenyloxy, C2-C20 alkynyloxy, C5-C20 aryloxy, acyl (including C2-C20 alkylcarbonyl (—CO-alkyl) and C6-C20 arylcarbonyl (—CO-aryl)), acyloxy (—O-acyl), C2-C20 alkoxycarbonyl (—(CO)—O-alkyl), C6-C20 aryloxycarbonyl (—(CO)—O-aryl), halocarbonyl (—CO)—X where X is halo), C2-C20 alkylcarbonato (—O—(CO)—O-alkyl), C6-C20 arylcarbonato (—O—(CO)—O-aryl), carboxy (—COOH), carboxylato (—COO—), carbamoyl (—(CO)—NH2), mono-substituted C1-C20 alkylcarbamoyl (—(CO)—NH(C1-C20 alkyl)), di-substituted alkylcarbamoyl (—(CO)—N(C1-C20 alkyl)2), mono-substituted arylcarbamoyl (—(CO)—NH-aryl), thiocarbamoyl (—(CS)—NH2), carbamido (—NH—(CO)—NH2), cyano (—C≡N), isocyano (—N+≡C−), cyanato (—O—C≡N), isocyanato (—O—N+≡C−), isothiocyanato (—S—C≡N), azido (—N═N+═N−), formyl (—(CO)—H), thioformyl (—(CS)—H), amino (—NH2), mono- and di-(C1-C20 alkyl)-substituted amino, mono- and di-(C5-C20 aryl)-substituted amino, C2-C20 alkylamido (—NH—(CO)-alkyl), C5-C20 arylamido (—NH—(CO)-aryl), imino (—CR═NH where R=hydrogen, C1-C20 alkyl, C5-C20 aryl, C6-C20 alkaryl, C6-C20 aralkyl, etc.), alkylimino (—CR═N(alkyl), where R=hydrogen, alkyl, aryl, alkaryl, etc.), arylimino (—CR═N(aryl), where R=hydrogen, alkyl, aryl, alkaryl, etc.), nitro (—NO2), nitroso (—NO), sulfo (—SO2—OH), sulfonato (—SO2—O−), C1-C20 alkylsulfanyl (—S-alkyl; also termed “alkylthio”), arylsulfanyl (—S-aryl; also termed “arylthiol”), C1-C20 alkylsulfinyl (—(SO)-alkyl), C5-C20 arylsulfinyl (—(SO)-aryl), C1-C20 alkylsulfonyl (—SO2-alkyl), C5-C20 arylsulfonyl (—SO2-aryl), phosphono (—P(O)(OH)2), phosphonato (—P(O)(O−)2), phosphinato (—P(O)(O−)), phospho (—PO2), -phosphino (—PH2), mono- and di-(C1-C20 alkyl)-substituted phosphino, mono- and di-(C5-C20 aryl)-substituted phosphino; and the hydrocarbyl moieties such as C1-C20 alkyl (including C1-C18 alkyl, further including C1-C12 alkyl, and further including C1-C6 alkyl), C2-C20 alkenyl (including C2-C18 alkenyl, further including C2-C12 alkenyl, and further including C2-C6 alkenyl), C2-C20 alkynyl (including C2-C18 alkynyl, further including C2-C12 alkynyl, and further including C2-C6 alkynyl), C5-C30 aryl (including C5-C20 aryl, and further including C5-C12 aryl), and C6-C20 aralkyl (including C6-C20 aralkyl, and further including C6-C12 aralkyl). In addition, the aforementioned functional groups may, if a particular group permits, be further substituted with one or more additional functional groups or with one or more hydrocarbyl moieties such as those specifically enumerated above. For example, the alkyl or alkenyl group may be branched. For example, the “substituent” is an alkyl group, e.g., a methyl group.
In a second aspect, the present disclosure provides a method of making any one of Compound 1 or 1.1 et seq., comprising the step of reducing a cannabinoid (e.g., by catalytic hydrogenation) to provide a hydrogenated (e.g., partially or fully hydrogenated) cannabinoid, and optionally further derivatizing the initial hydrogenation product to form additional Compounds, e.g., esters, ethers, acids, alcohols, aldehydes, ketones, and other derivatives. In some embodiments, the hydrogenation reaction may be preceded by an alkene addition reaction (e.g., hydration or epoxidation and hydrolysis of an exocyclic double bond). In some embodiments, the hydrogenation may be preceded by the acylation or etherification of a hydroxy group. In some embodiments, the hydrogenation may be proceeded by reduction of the carboxylic acid group to a primary alcohol and optionally further derivatization thereof (e.g., etherification or esterification). In some embodiments, the hydrogenation may be proceeded by conversion of the carboxylic acid group to a carboxylic ester.
By way of example, and without limiting the scope of the disclosure, any such further derivatization reactions preceding or following hydrogenation may include one or more of the following (which reactions may be conducted on the original core of the cannabinoid, or on a pendant group itself added via one of the below reactions):
Exemplary prophetic reactions which might be used to form the various Compounds of the Invention (e.g., Compound 1 et seq.) include the following:
Additional exemplary prophetic reaction schemes which might be used to form the various Compounds of the Invention (e.g., Compound 1 et seq.) including the following:
While the previous two paragraphs' synthetic schemes present exemplary chemical reactions which may be conducted starting from cannabigerol as shown, it is understood that each of these reactions, or any combination thereof, can be used on any Compound of Formula I, et seq., described herein, including, but not limited to, cannabigerol, cannabichromene, cannabidiol, cannabinol, cannabigerolic acid, cannabichromenic acid, cannabidiolic acid, cannabinolic acid, tetrahydrocannabinol, tetrahydrocannabinolic acid, or any ether, ester, or other derivative thereof. The use of cannabigerol in the above schemes is merely by way of example.
Suitable solvents and reactions conditions (concentration, time, temperature) for the conducting the above reactions are generally known to those skilled in the art and are not limited in any way in the present disclosure. Depending on the choice of reagents, suitable solvents may include one or more of apolar, polar protic and/or polar aprotic solvents, for example hydrocarbons, ethers, and esters.
In some embodiments, one or more of the above reactions may be carried out at a temperature of −100° C. to 300° C. For example, depending on the reaction, suitable temperature ranges may include −100 to −50° C., −50 to −25° C., −25 to −0° C., 0 to 25° C., 20 to 30° C., 30 to 60° C., 60 to 100° C., 100 to 150° C., 150 to 200° C., or 200 to 300° C. In some embodiments, one or more of the above reactions may be carried out for 0.1 to 100 hours. For example, depending on the reaction, suitable reaction times may include 0.1 to 0.25 hours, 0.25 to 0.5 hours, 0.5 to 1.0 hours, 1-2 hours, 2-6 hours, 6-12 hours, 12-24 hours, 24-48 hours, or 48-96 hours.
Where hydrogenation is employed, suitable hydrogen pressures range from 1 atmosphere to 20 atmospheres, e.g., 1 to 3 atmospheres, 3 to 6 atmospheres, 6 to 10 atmospheres, or 10 to 20 atmospheres. Hydrogenation reactions, depending on the substrate and the type of bond being reduced, may be conducted with any of the catalysts known in the art, including homogenous and heterogenous catalysts. Suitable catalysts may include palladium, platinum, iridium, ruthenium, and rhodium catalysts. In some embodiments, transfer hydrogenation (e.g., using ammonium formate as the hydrogen donor) may be used instead of hydrogen gas.
Oxidation and reduction reactions may be carried out according to standard methods in the art. Suitable oxidation reagents generally include chromium compounds (e.g., chromium trioxide, chromic acid, pyridinium chlorochromate, alkali metal chromates, alkali metal dichromates), permanganate compounds (e.g., potassium permanganate), perborate compounds (e.g., sodium perborate), osmium compounds (e.g., osmium tetroxide), peroxide compounds (e.g., hydrogen peroxide, peracetic acid, trifluoroperacetic acid, meta-chloroperoxybenzoic acid), nitric acid, chlorine compounds (e.g., chlorine dioxide, hypochlorous acid or salts, perchloric acid or salts), hypervalent iodine compounds (e.g., 2-iodosobenzoic acid, Dess-Martin periodinane), and oxygen species (e.g., oxygen or ozone). Suitable reducing agents generally include metal hydride agents (e.g., sodium borohydride, sodium triacetoxyborohydride, lithium borohydride, lithium tri-sec-butyl borohydride, sodium cyanoborohydride, lithium aluminum hydride, diisobutylaluminum hydride, sodium bis(methoxyethoxy) aluminum hydride, zinc amalgam, zinc in acid (e.g., acetic acid or hydrochloric acid), formic acid, iron(II) salts, tin(II) salts, and boranes (e.g., borane-THF complex, borane-dimethylsulfide complex, 9-borabicyclononane).
Suitable hydrolysis conditions are known in the art and generally include acidic conditions (e.g., hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid), or basic conditions (e.g., salts of hydroxide, carbonate, bicarbonate, alkoxides) in suitable solvent, often mixture of water with an organic solvent (e.g., methanol, ethanol, t-butanol, THF, acetonitrile).
Suitable alkylation and acylation conditions are known in the art, and generally include reacting a hydroxy compound with an alkyl halide or acyl halide in the presence of a base (e.g., an organic base, such as triethylamine, diisopropylamine, N-methylmorpholine, pyridine or dimethylaminopyridine, or an inorganic base, such as an alkali metal hydroxide, carbonate, or bicarbonate) in a suitable solvent. Other acylation conditions include those assisted by an activating agent, such as for less reactive alcohols. Suitable activating agents include diimides (e.g., dicyclohexylcarbodiimide, diisopropylcarbodiimide, 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide), 1,1-carbonyldiimidazole, thionyl chloride, and oxalyl chloride.
Compounds according to the present disclosure may be used for numerous purposes, including, but not limited to, as emollients, solubilizers, anti-frizz agents, lubricants, carriers, conditioners, surfactants, adjuvants, dispersants, emulsifiers, fuels, paraffins, candles, and as a precursor for polymers, film-formers, resins and composites. Thus, in another aspect, the present disclosure provides for the use of Compound 1 or any of 1.1 et seq., for any of these purposes.
In another aspect, the present disclosure provides a composition comprising Compound 1 or any of 1.1 et seq., optionally in admixture with one or more pharmaceutically acceptable, cosmetically acceptable, or industrially acceptable excipients or carriers, for example, solvents, oils, surfactants, emollients, diluents, glidants, abrasives, humectants, polymers, plasticizer, catalyst, antioxidant, coloring agent, flavoring agent, fragrance agent, antiperspirant agent, antibacterial agent, antifungal agent, hydrocarbon, stabilizer, or viscosity controlling agent. In some embodiments, the composition is a pharmaceutical composition, or a cosmetic composition, or a sunscreen composition, or a plastic composition, or a lubricant composition, or a personal care composition (e.g., a soap, skin cream or lotion, balm, shampoo, body wash, hydrating cream, deodorant, antiperspirant, after-shave lotion, cologne, perfume, or other hair care or skin care product), or a cleaning composition (e.g., a surface cleaner, a metal cleaner, a wood cleaner, a glass cleaner, a body cleaner such as a soap, a dish-washing detergent, or a laundry detergent), or an air freshener.
The compounds of the present disclosure, e.g., Compound 1, et seq., may be used with, for example: perfumes, soaps, insect repellants and insecticides, detergents, household cleaning agents, air fresheners, room sprays, pomanders, candles, cosmetics, toilet waters, pre- and aftershave lotions, talcum powders, hair-care products, body deodorants, anti-perspirants, shampoo, cologne, shower gel, hair spray, pet litter, lubricating oils, heating oils, and diesel fuels.
Fragrance and ingredients and mixtures of fragrance ingredients that may be used in combination with the disclosed compound for the manufacture of fragrance compositions include, but are not limited to, natural products including extracts, animal products and essential oils, absolutes, resinoids, resins, and concretes, and synthetic fragrance materials which include, but are not limited to, alcohols, aldehydes, ketones, ethers, acids, esters, acetals, phenols, ethers, lactones, furansketals, nitriles, acids, and hydrocarbons, including both saturated and unsaturated compounds and aliphatic carbocyclic and heterocyclic compounds, and animal products.
In some embodiments, the present disclosure provides personal care compositions including, but not limited to, soaps (liquid or solid), body washes, skin and hair cleansers, skin creams and lotions (e.g., facial creams and lotions, face oils, eye cream, other anti-wrinkle products), ointments, sunscreens, moisturizers, hair shampoos and/or conditioners, deodorants, antiperspirants, other conditioning products for the hair, skin, and nails (e.g., shampoos, conditioners, hair sprays, hair styling gel, hair mousse), decorative cosmetics (e.g., nail polish, eye liner, mascara, lipstick, foundation, concealer, blush, bronzer, eye shadow, lip liner, lip balm) and dermocosmetics.
In some embodiments, the personal care compositions may include organically-sourced ingredients, vegan ingredients, gluten-free ingredients, environmentally-friendly ingredients, natural ingredients (e.g. soy oil, beeswax, rosemary oil, vitamin E, coconut oil, herbal oils etc.), comedogenic ingredients, natural occlusive plant based ingredients (e.g. cocoa, shea, mango butter), non-comedogenic ingredients, bakuchiol (a plant derived compound used as a less-irritating, natural alternative to retinol), color active ingredients (e.g., pigments and dyes); therapeutically-active ingredients (e.g., vitamins, alpha hydroxy acids, corticosteroids, amino acids, collagen, retinoids, antimicrobial compounds), sunscreen ingredients and/or UV absorbing compounds, reflective compounds, oils (such as castor oil and olive oil, or high-viscosity oils), film formers, high molecular weight esters, antiperspirant active ingredients, glycol solutions, water, alcohols, emulsifiers, gellants, emollients, water, polymers, hydrocarbons, conditioning agents, and/or aliphatic esters.
In some embodiments, the present compositions are gluten free.
In some embodiments, the present compositions are formulated as oil-in-water emulsions, or as water-in-oil emulsions. In some embodiments, the compositions may further comprise one or more hydrocarbons, such as heptane, octane, nonane, decane, undecane, dodecane, isododecane, tridecane, tetradecane, pentadecane, hexadecane, heptadecane, octadecane, nonadecane, henicosane, docosane, and tricosane, and any saturated linear or saturated branched isomer thereof.
In some embodiments, the present disclosure provides a fuel composition which comprises, or consists of, fully reduced (e.g., saturated and optionally oxygenated) compounds of the present disclosure, for use as a fuel or fuel component, e.g., as diesel fuel. For example, the compounds according to embodiments 1.42-1.44, supra, are C21 to C22 hydrocarbons having from zero to four oxygen atoms (either as ethers or as alcohols), and these are particularly suitable for use as fuels or as fuel components (e.g., as diesel fuels, which typically comprise C9-C25 hydrocarbons). Thus, the compounds may be formulated into a fuel composition optionally blended with other typical petroleum-derived hydrocarbons, such as aliphatic C9-C25 hydrocarbons. There has been an increasing need for oxygenated fuels to improve combustion performance in engines, and the oxygenated saturated hydrocarbons of the present disclosure may be particularly suited to such purposes.
As used herein, the phrases “for example,” “for instance,” “such as,” or “including” are meant to introduce examples that further clarify more general subject matter. These examples are provided only as an aid for understanding the disclosure, and are not meant to be limiting in any fashion. Furthermore, as used herein, the terms “may,” “optional,” “optionally,” or “may optionally” mean that the subsequently described circumstance may or may not occur, so that the description includes instances where the circumstance occurs and instances where it does not. For example, the phrase “optionally present” means that an object may or may not be present, and, thus, the description includes instances wherein the object is present and instances wherein the object is not present.
As used herein, the phrase “having the formula” or “having the structure” is not intended to be limiting and is used in the same way that the term “comprising” is commonly used.
In the present specification, the structural formula of the compound may represent a certain isomer for convenience in some cases, but the present invention includes all isomers, such as geometrical isomers, optical isomers based on an asymmetrical carbon, stereoisomers, tautomers, and the like. In addition, a crystal polymorphism may be present for the compounds represented by the formulas describe herein. It is noted that any crystal form, crystal form mixture, or anhydride or hydrate thereof is included in the scope of the present invention.
“Tautomers” refers to compounds whose structures differ markedly in arrangement of atoms, but which exist in easy and rapid equilibrium. It is to be understood that the compounds of the invention may be depicted as different tautomers. it should also be understood that when compounds have tautomeric forms, ail tautomeric forms are intended to be within the scope of the invention, and the naming of the compounds does not exclude any tautomeric form. Further, even though one tautomer may be described, the present invention includes all tautomers of the present compounds.
Any compound disclosed herein which comprises an acidic or basic group, such as a carboxylic acid group or amine group, may be formed or used in its free acid form or in its free base form, or as a salt. As used herein, the term “salt” can include acid addition salts including hydrochlorides, hydrobromides, phosphates, sulfates, hydrogen sulfates, alkylsulfonates, arylsulfonates, acetates, benzoates, citrates, maleates, fumarates, succinates, lactates, and tartrates; alkali metal cations such as Na+, K+, Li+, alkali earth metal salts such as Mg2+ or Ca2+, or organic amine salts, or organic phosphonium salts.
All percentages used herein, unless otherwise indicated, are by volume.
All ratios used herein, unless otherwise indicated, are by molarity.
The compounds disclosed herein can be prepared through a number of straightforward chemical procedures, as described above, which are generally known to the skilled artisan. For example, as provided in March's Advanced Organic Chemistry: Reactions, Mechanisms, and Structure by Michael B. Smith and Jerry March (6th Ed., John Wiley & Sons 2007). Compounds according to the present disclosure may be isolated and purified according to procedures known in the art, for example, extraction, fractional distillation, crystallization and chromatography.
Methods for extracting the raw cannabinoid compounds from plant parts are known in the art. See, for example, Ansari et al., J. Essential Oil Bearing Plants, 20:1, 175-184 (2017), and Andre et al., Frontiers in Plant Science, 7:19 (2016). For example, dried Cannabis plant parts, such as the flowers, may be subject to either ethanol extraction (hot or cold) or supercritical carbon dioxide extraction to obtain an extract oil. Optionally, the oil can be chilled to about −20° C. to precipitate out undesired waxes. Further optionally, the resulting oil can then be heated to about 100 to 120° C. to cause thermal decarboxylation of the cannabinoid acids present. The various organic molecules can be separated by traditional methods, such as distillation (e.g., vacuum distillation), crystallization (e.g., from heptane), or chromatography, to provide various mixtures of components for further chemical elaboration according to the procedures described herein.
This application is a U.S. nonprovisional application filed under 35 U.S.C. § 111(a), which claims priority to U.S. provisional application 63/234,292, filed on Aug. 18, 2021, the contents of which are hereby incorporated by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| 63234292 | Aug 2021 | US |
