Intermediates for producing enyne derivatives

Details Intermediates for producing enyne derivatives Intermediates for producing enyne derivatives

C - Chemistry, Metallurgy

07

C

C07C 211/30 (2006.01) C07C 211/27 (2006.01) C07C 215/50 (2006.01) C07C 217/58 (2006.01) C07D 333/04 (2006.01) C07D 333/62 (2006.01)

Patent

CA 2351999

Disclosed is a compound of the formula: (see formula I) wherein: R14 is a hydrogen atom or a lower alkyl group; R25 is a group of the formula: (see formula II, III and IV) in which: each of R3, R31 and R32, which may be the same or different, is a hydrogen atom or a lower alkyl group: each of R4, R5, R41 and R51, which may be the same or different, is a hydrogen atom, a halogen atom, a hydroxyl group, a lower alkyl group or a lower alkoxy group; R42 is a hydroxyl group, a halogen atom, a group of the formula B-O- (wherein B is a protecting group for a hydroxyl group), a hydroxmethyl group, a formyl group, a carboxyl group, a lower alkoxycarbonal group, a lower alkanoyl group, an amino group, a mercapto group or a group of the formula R6-X-Y- (wherein R6 is a phenyl or thienyl group which may have one or two substituents selected from the group consisting of a halogen atom, a hydroxyl group, a lower alkyl group, a cyano group, a lower alkoxy group and a heterocyclic group, each of X and Y, which may be the same or different, is an oxygen atom, a sulfur atom, a carbonyl group, a group of the formula -CHR a- [wherein R a is a hydrogen atom or a lower alkyl group) or a group of the formula -NR b- [wherein R b is a hydrogen atom or a lower alkyl group), or X and Y together form a vinylene group or an ethynlene group), provided that when either one of X and Y is an oxygen atom, a sulfur atom or a group of the formula -NR b- (wherein R b is as defined above), the other is a carbonyl group or a group of the formula -CHR a- (wherein R a is as defined above); and W a is a chlorine atom or a bromine atom.

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