METHOD FOR PREPARING CIS-BICYCLO(3.3.0)OCTYLIDENE DERIVATIVE

摘要

Disclosed is a method for preparing a cis-bicyclo [3.3.0]octylidene derivative represented by the formula: …… wherein… R<1> is a hydrogen atom or an alkyl group;… R<2> is a hydrogen atom or a protective group for hydroxyl group; and… Y is -CH2OR<3> or …… where… R<3> is a hydrogen atom or a protective group for hydroxyl group;… R<4> is a hydrogen atom or a straight, branched or cyclic alkyl group, alkenyl group or alkynyl group; and… X is a group represented by CH=CH or C IDENTICAL C,… which comprises carrying out the catalytic hydrogenation reaction of a (1-alkenyl)-cis-bicyclo[3.3.0]octene derivative represented by the formula: ……