| 摘要 |
Bicyclo[3.3.0]octenylaldehyde derivatives represented by the formula: <IMAGE> wherein R1 is a substituent selected from the group consisting of a hydrogen atom and a protective group of a hydroxy group; R2 is a substituent selected from the group consisting of -CH2OR5, <IMAGE> where R5 is a substituent selected from the group consisting of a hydrogen atom and a protective group of a hydroxy group, R6 is a substituent selected from the group consisting of an alkyl group, an alkenyl group and an alkynyl group, said substituent being straight, branched or cyclic and having 5 to 10 carbon atoms, X is a substituent selected from the group consisting of a vinylene group and an acetylene group, and R7 is a substituent selected from the group consisting of an alkyl, an alkenyl group, and an alkynyl group, said substituent being straight, branched or cyclic and having 5 to 10 carbon atoms; and R4 is a hydrogen atom, and a process for producing the derivatives are available for producing a 9(0)-methano- DELTA 6(9. alpha )-PGI1.
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