| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing vitamin A. SOLUTION: This method for producing the vitamin A is characterized by performing a reaction of a sulfone compound expressed by formula (1) (wherein, Ar is an aryl which may have a substituting group) with an arylhalide derivative expressed by formula (2) (wherein, X<SP>1</SP>, X<SP>2</SP>are the same or different and are each a halogen atom; R is a blocking group of hydroxy; and a wavy line expresses that the stereochemistry of a double bond to which X<SP>1</SP>or X<SP>2</SP>bonds, is any of E-form, Z-form or E/Z mixture) in the presence of an alkali metal hydroxide. COPYRIGHT: (C)2003,JPO
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