| 摘要 |
2064217 9118890 PCTABS00008 A compound of general formula I(a) and/or I(b) and/or I(c), in which R1 represents a methyl group or a group of the general formula -CH2.SO2.R2 or -CH2.SO2.NR2R3, in which each of R2 and R3 independently represents an alkyl, cycloalkyl or optionally substituted phenyl or phenalkyl group; each of R4, R5 and R6 independently represents a hydrogen atom or a methyl group; X represents a group of formula C(CH3)2 or, when both of R5 and R6 represent methyl groups, also represents a group of formula CH2; Q represents an oxygen or sulphur atom; and Y represents a hydrogen atom, an alkali metal atom or a group of the general formula -COA in which A represents a halogen atom or an alkyl or alkoxy group optionally substituted by a phenyl, cycloalkyl, alkoxy or alkylcarbonyl group. The compounds are bicyclic optically active compounds and are useful in the synthesis of optical isomers and separation of optical isomers from mixtures.
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