Claims
- 1. A process comprising cyclizing a compound of formula ##STR20## wherein R.sup.1 is methyl or ethyl,
- l is 1 or 2, and
- K is a blocked keto group in the form of ketal or thioketal,
- V' is a phenyl ring of the formula ##STR21## wherein Hal is fluorine, chlorine, bromine or iodine;
- R.sup.4a and R.sup.4'a being the same or different, are each hydrogen, --OR.sup.11, --S(O).sub.k R.sup.11, --N(O).sub.n R.sup.11 R.sup.12, --O-SO.sub.2 R.sup.13, --P(O)(OR.sup.14).sub.2, --SiR.sub.3.sup.14 or --SnR.sub.3.sup.14 ;
- k is 0, 1 or 2;
- n is 0 or 1;
- R.sup.11 is hydrogen or C.sub.1 -C.sub.8 -alkyl;
- R.sup.12 is hydrogen, C.sub.1 -C.sub.8 -alkyl, cyanide or C.sub.1 -C.sub.10 -acyl;
- R.sup.13 is perfluorated C.sub.1 -C.sub.4 -alkyl;
- R.sup.14 is C.sub.1 -C.sub.4 -alkyl;
- R.sup.11 and R.sup.12, in an --N(O).sub.n R.sup.11 R.sup.12 group, can together be, with the inclusion of N, a 5- or 6-member heterocyclic ring, which can contain another heteroatom N, O or S;
- Y.sup.a and Y.sup.'a being the same or different, are each a direct bond, a straight-chain or branched alkylene group, which can contain double or triple bond(s), having up to 20 carbon atoms, which is unsubstituted or substituted by one or more oxo-, C.sub.1 -C.sub.10 -acyloxy-, --OR.sup.11, --S(O).sub.k R.sup.11 and/or --N(O).sub.n R.sup.11 R.sup.12 groups;
- R.sup.4a -Y.sup.a and R.sup.4'a -Y'.sup.a together are a saturated, unsaturated or aromatic, 5- or 6-member ring with 0 to 2 oxygen, sulfur atoms and/or NR.sup.11 groups; or
- R.sup.4'a -Y'.sup.a is H and R.sup.4a -Y.sup.a is phenyl, naphthyl, 2 -methoxyphenyl, 3-methoxyphenyl, 4-methoxyphenyl, 2-tolyl, 3-tolyl, 4-tolyl, furyl-2, furyl-3, thienyl-2, thienyl-3, pyridyl-2, pyridyl-3, pyridyl-4, thiazoyl or imidazolyl;
- with the proviso that k and n are each greater than 0 only if their respective R.sup.11 group is C.sub.1 -C.sub.8 -alkyl, and wherein any hydroxy, mercapto, amino, oxo and/or terminal acetylene groups are protected; or is a 5- or 6-member heteroaromatic ring with 0 to 2 N, O or S atoms of the formula ##STR22## wherein Hal, R.sup.4a, R.sup.4'a, Y.sup.a and Y'.sup.a are as defined above, wherein any hydroxy, mercapto, amino, oxo and/or
- terminal acetylene groups are protected, to obtain a compound according to formula IVa ##STR23## wherein Q is .beta.-hydroxy,
- S is .alpha.-hydrogen,
- K is a blocked keto group in the form of ketal or thioketal,
- l is b 1 or 2,
- R.sup.1 is methyl or ethyl, and
- V" is a phenyl radical according to the formula ##STR24## wherein R.sup.4 and R.sup.4' being the same or different, are each hydrogen, --OR.sup.11, --S(O).sub.k R.sup.11, --N(O).sub.n R.sup.11 R.sup.12, --O--SO.sub.2 R.sup.13, --p(O)(OR.sup.14).sub.2, --SiR.sub.3.sup.14 or --SnR.sub.3.sup.14,
- k is 0, 1 or 2,
- n is 0 or 1,
- R.sup.11 is hydrogen or C.sub.1 -C.sub.8 -alkyl,
- R.sup.12 is cyanide or C.sub.1 -C.sub.10 -acyl,
- R.sup.13 is perfluorated C.sub.1 -C.sub.4 -alkyl,
- R.sup.14 is C.sub.1 -C.sub.4 -alkyl, or
- R.sup.11 and R.sup.12, in an --N(O).sub.n R.sup.11 R.sup.12 group, can also together be, with the inclusion of N, a 5- or 6-member heterocyclic ring, which can contain another heteroatom N, O or S,
- Y and Y', being the same or different, are each a direct bond or a straight-chain or branched alkylene group, which can contain double or triple bond(s), having up to 20 carbon atoms, and which is unsubstituted or substituted by one or more oxo-, C.sub.1 -C.sub.10 -acyloxy-, --OR.sup.11, --S(O).sub.k R.sup.11 and/or --N(O).sub.n R.sup.11 R.sup.12 ;
- R.sup.4 -Y and R.sup.4' -Y' together are a saturated, unsaturated or aromatic, 5- or 6-member ring with 0 to 2 oxygen, sulfur atoms and/or NR.sup.11 ; or
- R.sup.4' -Y' is H and R.sup.4 -Y is phenyl, naphthyl, 2-methoxyphenyl, 3-methoxyphenyl, 4-methoxyphenyl, 2-tolyl, 3-tolyl, 4-tolyl, furyl-2, furyl-3, thienyl-2, thienyl-3, pyridyl-2, pyridyl-3, pyridyl-4, thiazoyl or imidazolyl;
- wherein k and n are each greater than 0 only if their respective R.sup.11 group is C.sub.1 -C.sub.8 -alkyl, or
- V" is a five-or six-member heteroaromatic ring with 1 to 2 N, O or S atoms of the formula ##STR25## wherein R.sup.4, R.sup.4', Y and Y' have the meanings indicated above;
- wherein any hydroxy, mercapto, amino, oxo and/or terminal acetylene groups present are protected.
- 2. A process according to claim 1, wherein V" is ##STR26##
- 3. A process according to claim 2, further comprising, by use of a dehydrating agent, unblocking keto group K to form a 3-oxo group and a 4(5)-double bond.
- 4. A process according to claim 3, further comprising oxidizing .beta.-hydroxy group Q to obtain a compound having a 17-oxo group.
- 5. A process according to claim 4, further comprising protecting the 3-oxo group with a protective group, and subsequently converting the D ring, to a ring of the formula ##STR27## wherein ---- is a single or double bond,
- W is --CH.sub.2 --, .dbd.CH--, --CH.sub.2 CH.sub.2 -- or .dbd.CHCH.sub.2 --,
- R.sup.5 and R.sup.6 are, respectively, --OR.sup.7 and --C.tbd.C--U, ##STR28## --OR.sup.7 and --(CH.sub.2).sub.m --CH.sub.2 --R.sup.9, --OR.sup.7 and --CH.dbd.CH(CH.sub.2).sub.k --CH.sub.2 --R.sup.9,
- --OR.sup.10 and --H,
- --OR.sup.10 and --(CH.sub.2).sub.k --C.tbd.C--U, or
- R.sup.5 and R.sup.6 together are ##STR29## R.sup.7 is hydrogen or C.sub.m1 -C.sub.4 -acyl, U is hydrogen, halogen, or alkyl, hydroxyalkyl, alkoxyalkyl, or acyloxyalkyl with respectively 1 to 4 carbon atoms in the alkyl and acyl portions thereof,
- R.sup.8 is hydrogen, hydroxy, or alkyl, O-alkyl or O-acyl, each with respectively 1 to 4 C atoms,
- R.sup.9 is hydrogen, hydroxy, cyano, or O-alkyl or O-acyl, each with respectively 1 to 4 carbon atoms,
- R.sup.10 is hydrogen, or alkyl or acyl, each with respectively 1 to 10 carbon atoms,
- m is 0, 1, 2 or 3, and
- is 0, 1 or 2.
- 6. A process according to claim 5, further comprising removing said protective group from the 3-oxo group and functionalizing ring A to form a ring of the formula ##STR30## wherein M and N together are a second bond or M is hydrogen and N is hydroxy,
- X is oxygen, two hydrogen atoms, or N.about.OH,
- R.sup.3 and D, being the same or different, are hydrogen, nitrile or C.sub.1 -C.sub.4 -alkyl, or together are a methylene or ethylene group,
- E is hydrogen or C.sub.1 -C.sub.4 -alkyl,
- D and E together can also be a second bond between carbon atoms 1 and 2 or together are a methylene group,
- wherein X is not oxygen when N is hydroxy and M,
- R.sup.3, D and E are all each hydrogen, ##STR31## wherein R.sup.11 is as defined above.
- 7. A process according to claim 2, further comprising oxidizing .beta.-hydroxy group Q to obtain a compound having a 17-oxo group.
- 8. A process according to claim 7, further comprising converting said 17-oxo group to form a D ring of the formula ##STR32## wherein ---- is a single or double bond,
- W is --CH.sub.2 --, .dbd.CH--, --CH.sub.2 CH.sub.2 -- or .dbd.CHCH.sub.2 --,
- R.sup.5 and R.sup.6 are, respectively, --OR.sup.7 and --C.tbd.C--U, ##STR33## --OR.sup.7 and --(CH.sub.2).sub.m --CH.sub.2 --R.sup.9, --OR.sup.7 and --CH=CH(CH.sub.2).sub.k --CH.sub.2 --R.sup.9,
- --OR.sup.10 and --H,
- --OR.sup.10 and --(CH.sub.2).sub.k --C.tbd.C--U, or
- R.sup.5 and R.sup.6 together are ##STR34## R.sup.7 is hydrogen or C.sub.1 -C.sub.4 -acyl, U is hydrogen, halogen, or alkyl, hydroxyalkyl, alkoxyalkyl, or acyloxyalkyl with respectively 1 to 4 carbon atoms in the alkyl and acyl portions thereof,
- R.sup.8 is hydrogen, hydroxy, or alkyl, O-alkyl or O-acyl, each with respectively 1 to 4 C atoms,
- R.sup.9 is hydrogen, hydroxy, cyano, or O-alkyl or O-acyl, each with respectively 1 to 4 carbon atoms,
- R.sup.10 is hydrogen, or alkyl or acyl, each with respectively 1 to 10 carbon atoms,
- m is 0, 1, 2 or 3, and
- k is 0, 1 or 2.
- 9. A process according to claim 8, further comprising, by use of a dehydrating agent, subsequently unblocking keto group K to form a 3-oxo group and a 4(5)-double bond.
- 10. A process according to claim 2, wherein said R.sup.4 -Y is a protected hydroxy group and said process further comprises converting said protected hydroxy group to a hydroxy group.
- 11. A process according to claim 10, wherein R.sup.4 -Y is --OR.sup.11 and R.sup.11 is C.sub.1-8 -alkyl, and --OR.sup.11 is converted to --OH.
- 12. A process according to claim 10, further comprising, by use of a dehydrating agent, unblocking keto group K to form a 3-oxo group and a 4(5)-double bond.
- 13. A process according to claim 12, wherein hydroxy group R.sup.4' -Y' is converted to --Y--OSO.sub.2 R.sup.13 and --Y--SO.sub.2 R.sup.13 is subsequently converted to --Y--SiR.sub.3.sup.14.
- 14. A process according to claim 10, wherein hydroxy group R.sup.4 --Y is subsequently converted to --Y--OSO.sub.2 R.sup.13, --Y--SiR.sub.3.sup.14 or --Y--SnR.sub.3.sup.14.
- 15. A process according to claim 14, wherein hydroxy group R.sup.4' -Y' is converted to --Y--OSO.sub.2 R.sup.13 and --Y--SO.sub.2 R.sup.13 is subsequently converted to --Y--SiR.sub.3.sup.14.
- 16. A process according to claim 14, further comprising oxidizing .beta.-hydroxy group Q to obtain a 17-oxo group.
- 17. A process according to claim 16, further comprising converting the D ring, to a ring of the formula ##STR35## wherein ---- is a single or double bond,
- W is --CH.sub.2 --, .dbd.CH--, --CH.sub.2 CH.sub.2 -- or .dbd.CHCH.sub.2 --,
- R.sup.5 and R.sup.6 are, respectively, --OR.sup.7 and --C.tbd.C--U, ##STR36## --OR.sup.7 and --(CH.sub.2).sub.m --CH.sub.2 --R.sup.9, --OR.sup.7 and --CH=CH(CH.sub.2).sub.k --CH.sub.2 --R.sup.9,
- --OR.sup.10 and --H,
- --OR.sup.10 and --(CH.sub.2).sub.k --C.tbd.C--U, or
- R.sup.5 and R.sup.6 together are ##STR37## R.sup.7 is hydrogen or C.sub.1 -C.sub.4 -acyl, U is hydrogen, halogen, or alkyl, hydroxyalkyl, alkoxyalkyl, or acyloxyalkyl with respectively 1 to 4 carbon atoms in the alkyl and acyl portions thereof,
- R.sup.8 is hydrogen, hydroxy, or alkyl, O-alkyl or O-acyl, each with respectively 1 to 4 C atoms,
- R.sup.9 is hydrogen, hydroxy, cyanide, or O-alkyl or O-acyl, each with respectively 1 to 4 carbon atoms,
- R.sup.10 is hydrogen, or alkyl or acyl, each with respectively 1 to 10 carbon atoms,
- m is 0, 1, 2 or 3, and
- k is 0, 1 or 2.
- 18. A process according to claim 17, further comprising, by a dehydrating agent, unblocking keto group K to form a 3-oxo group and a 4(5)-double bond.
- 19. A process according to claim 17, wherein prior to converting the D ring, the R.sup.4 --Y-- group is converted to --Y--H.
- 20. A process according to claim 7, wherein said R.sup.4 --Y is a protected hydroxy group and said process further comprises converting said protected hydroxy group to a hydroxy group.
- 21. A process according to claim 20, wherein hydroxy group R.sup.4 --Y is subsequently converted to --Y--OSO.sub.2 R.sup.13 --Y--SiR.sub.3.sup.14 or --Y--SnR.sub.3.sup.14.
- 22. A process according to claim 21, further comprising converting the D ring, to a ring of the formula ##STR38## wherein ---- is a single or double bond, W is --CH.sub.2 --, =CH--, --CH.sub.2 CH.sub.2 -- or =CHCH.sub.2 --, R.sup.5 and R.sup.6 are, respectively, --OR.sup.7 and --C.tbd.C--U, ##STR39## --OR.sup.7 and --(CH.sub.2).sub.m --CH.sub.2 --R.sup.9, --OR.sup.7 and --CH=CH(CH.sub.2).sub.k --CH.sub.2 --R.sup.9,
- --OR.sup.10 and --H,
- --OR.sup.10 and --(CH.sub.2).sub.k --C.tbd.C--U, or
- R.sup.5 and R.sup.6 together are ##STR40## R.sup.7 is hydrogen or C.sub.1 -C.sub.4 -acyl, U is hydrogen, halogen, or alkyl, hydroxyalkyl, alkoxalkyl, or acyloxyalkyl with respectively 1 to 4 carbon atoms in the alkyl and acyl portions thereof,
- R.sup.8 is hydrogen, hydroxy, or alkyl, O-alkyl or O-acyl, each with respectively 1 to 4 C atoms,
- R.sup.9 is hydrogen, hydroxy, cyanide, or O-alkyl or O-acyl, each with respectively 1 to 4 carbon atoms,
- R.sup.10 is hydrogen, or alkyl or acyl, each with respectively 1 to 10 carbon atoms,
- m is 0, 1, 2 or 3, and
- k is 0, 1 or 2.
- 23. A process according to claim 22, further comprising, by a dehydrating agent, unblocking keto group K to form a 3-oxo group and a 4(5)-double bond.
- 24. A process according to claim 23, wherein prior to converting the D ring, the R.sup.4 --Y-- group is converted to --Y--H.
- 25. A process according to claim 7, further comprising, by use of a dehydrating agent, unblocking keto group K to form a 3-oxo group and a 4(5)-double bond.
- 26. A process according to claim 25, further comprising protecting the 3-oxo group with a protective group, and subsequently converting the D ring, to a ring of the formula ##STR41## wherein ---- is a single or double bond,
- W is --CH.sub.2 --, =CH--, --CH.sub.2 CH.sub.2 -- or =CHCH.sub.2,
- R.sup.5 and R.sup.6 are, respectively, --OR.sup.7 and --C.tbd.C--U, ##STR42## OR.sup.7 and --(CH.sub.2 ).sub.m --CH.sub.2 --R.sup.9, OR.sup.7 and --CH=CH(CH.sub.2).sub.k --CH.sub.2 --R.sup.9,
- --OR.sup.10 and --H,
- --OR.sup.10 and --(CH.sub.2).sub.k --C.tbd.C--U, or
- R.sup.5 and R.sup.6 together are ##STR43## R.sup.7 is hydrogen, or C.sub.1 -C.sub.4 -acyl, U is hydrogen, halogen, or alkyl, hydroxylalkyl, alkoxyalkyl or acyloxyalkyl with respectively 1 to 4 carbon atoms in the alkyl and acyl portions thereof,
- R.sup.8 is hydrogen, hydroxy, or alkyl, O-alkyl or O-acyl, each with respectively 1 to 4 C atoms,
- R.sup.9 is hydrogen, hydroxy, cyano, or O-alkyl or O-acyl, each with respectively 1 to 4 carbon atoms,
- R.sup.10 is hydrogen, or alkyl or acyl, each with respectively 1 to 10 carbon atoms,
- m is 0, 1, 2 or 3, and
- k is 0, 1 or 2.
- 27. A process according to claim 26, further comprising removing said protective group from the 3-oxo group and functionalizing ring A to form a ring of the formula ##STR44## ) wherein
- M and N together are a second bond or M is hydrogen and N is hydroxy,
- X is oxygen, two hydrogen atoms, or N.about.OH,
- R.sup.3 and D, being the same or different, are hydrogen, nitrile or C.sub.1 -C.sub.4 -alkyl, or together are a methylene or ethylene group,
- E is hydrogen or C.sub.1 -C.sub.4 -alkyl,
- D and E together can also be a second bond between carbon atoms 1 and 2 or together are a methylene group,
- wherein X is not oxygen when N is hydroxy and M, R.sup.3, D and E are all each hydrogen, ##STR45## wherein R.sup.11 is as defined above.
- 28. A process according to claim 16, further comprising, by use of a dehydrating agent, unblocking keto group K to form a 3-oxo group and a 4(5)-double bond.
- 29. A process according to claim 28, further comprising protecting the 3-oxo group with a protective group, and subsequently converting the D ring, to a ring of the formula ##STR46## wherein ---- is a single or double bond,
- W is --CH.sub.2 --, =CH--, --CH.sub.2 CH.sub.2 -- or=CHCH.sub.2 --,
- R.sup.5 and R.sup.6 are, respectively, --OR.sup.7 and --C.tbd.C--U, ##STR47## --OR.sup.7 and --(CH.sub.2).sub.m --CH.sub.2 --R.sup.9, --OR.sup.7 and --CH=CH(CH.sub.2).sub.k --CH.sub.2 --R.sup.9,
- OR.sup.10 and --H,
- --OR.sup.10 and --(CH.sub.2).sub.k --C.hoarfrost.C--U, or
- R.sup.5 and R.sup.6 together are ##STR48## R.sup.7 is hydrogen or C.sub.1 -C.sub.4 -acyl, U is hydrogen, halogen, or alkyl, hydroxylalkyl, alkoxyalkyl, or acyloxyalkyl with respectively 1 to 4 carbon atoms in the alkyl and acyl portions thereof,
- R.sup.8 is hydrogen, hydroxy, or alkyl, O-alkyl or O-acyl, each with respectively 1 to 4 C atoms,
- R.sup.9 is hydrogen, hydroxy, cyano, or O-alkyl or O-acyl, each with respectively 1 to 4 carbon atoms,
- R.sup.10 is hydrogen, or alkyl or acyl, each with respectively 1 to 10 carbon atoms,
- m is 0, 1, 2 or 3, and
- k is 0, 1 or 2.
- 30. A process according to claim 29, further comprising removing said protective group from the 3-oxo group and functionalizing ring A to form a ring of the formula ##STR49## wherein M and N together are a second bond or M is hydrogen and N is hydroxy,
- X is oxygen, two hydrogen atoms, or N.about.OH,
- R.sup.3 and D, being the same or different, are hydrogen, nitrile or C.sub.1 -C.sub.4 -alkyl, or together are a methylene or ethylene group,
- E is hydrogen or C.sub.1 -C.sub.4 -alkyl,
- D and E together can also be a second bond between carbon atoms 1 and 2 or together are a methylene group,
- wherein X is not oxygen when N is hydroxy and M,
- R.sup.3, D and E are all each hydrogen, ##STR50## wherein R.sup.11 is as defined above.
- 31. A process according to claim 1, wherein protecting groups for protecting hydroxy, mercapto and keto groups are selected from methoxymethyl, ethoxymethyl, tetrahydropyranyl, ethylenedioxyketal, ethylenedithioketal and 2,2-dimethyltrimethylenedioxyketal.
- 32. A process according to claim 1, wherein the cyclization is conducted by reductive radical cyclization.
- 33. A process according to claim 1, wherein cyclization is conducted in liquid ammonia mixed with at least one organic solvent in the presence of an electropositive metal at a temperature of -100.degree.---30.degree. C.
- 34. A process according to claim 1, wherein V' is ##STR51##
- 35. A process according to claim 34, wherein Hal is fluorine or chlorine.
Priority Claims (1)
Number |
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37 08 942.0 |
Mar 1987 |
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Parent Case Info
This application is a continuation of application Ser. No. 07,793,880 (now abandoned), filed Nov. 18, 1991, which in turn is a division of application Ser. No. 07,283,632, filed Dec. 9, 1988 (now U.S. Pat. No. 5,095,129), which in turn is a continuation-in-part of Ser. No. 07/415,359, filed Sep. 18, 1989 (now abandoned).
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Divisions (1)
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283632 |
Dec 1988 |
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Continuations (1)
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793880 |
Nov 1991 |
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Continuation in Parts (1)
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415359 |
Sep 1989 |
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