摘要 |
2064234 9118910 PCTABS00008 A compound of general formula (I), in which each of R1, R2, R3 and R4 independently represent a hydrogen atom or a group -(CO)nR5 in which n is 0 or 1 and R5 represents an alkyl, aryl, cycloalkyl, alkaryl or aralkyl group, or R1 or R2 together and/or R3 and R4 together represent an alkylene group; 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, alkenyl or alkoxy group optionally substituted by a phenyl, cycloalkyl, alkoxy or alkylcarbonyl group. Such compounds are cyclic and optically active and are useful in asymmetric syntheses and in the separation of optically active isomers.
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申请人 |
BRITISH PETROLEUM COMPANY P.L.C. (THE) |
发明人 |
BANKS, MALCOLM R.;CADOGAN, JOHN I. G.;DAWSON, IAN M.;GOSNEY, IAN;HODGSON, PHILIP K. G. |