| 摘要 |
A process for the resolution of hemiacetal compounds of the formula <IMAGE> III wherein A is a hydrocarbon chain containing 1 to 16 groups, the said chain optionally containing at least one heteroatom, at least one unsaturation, the assembly of the group constituting the chain may be a mono- or polycyclic system including a spiro or endosystem and the assembly of chain A and the carbon atoms attached thereto can contain at least one chiral atom or the hemiacetal moiety thereto which can present a chirality due to the dissymetric spatial configuration of the molecule and Y is selected from the group consisting of hydrogen, alkyl of 1 to 18 carbon atoms optionally substituted, -CY3' and the beta , gamma bond together with Y can be part of A and Y' is bromine or chlorine and the resolution of alcohols of the formula R-OHIV wherein R is selected from the group consisting of primary, secondary or tertiary alcohol moiety having at least one asymmetric carbon or the remainder of a substituted alcohol with a chirality due to the dissymetric spatial configuration of the entire molecule comprising reacting in an organic solvent diisobutyl aluminum hydride and a racemate or optical isomer of a compound of the formula <IMAGE> II wherein A and Y have the above definition to obtain a compound of the formula <IMAGE>III and reacting the latter with a racemate or optical isomer of a compound of the formula R-OHIV wherein R has the above definition to obtain a compound of the formula <IMAGE> I wherein Y, A and R have the above definitions, separating the diastereoisomers and cleaving the latter to obtain the enantiomers of the hemiacetal of formula III if the racemate was used above or the alcohol of formula IV if the racemate was used above and novel compounds.
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