Process for producing vitamin A aldehyde and intermediate for producing the same

摘要

There are disclosed an alcohol derivative of formula (1): <CHEM> wherein Ar is an optionally substituted aryl group and R is a straight or branched C1-C3 lower alkyl group, and the wavy line depicted by " " indicates a single bond and stereochemistry relating to a double bond bound therewith is E or Z or a mixture thereof, and a process for producing the same and a process for producing Vitamin A aldehyde using the same.