| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a higherα,β-unsaturated alcohol in which engineering is easily performed. SOLUTION: This method for producing the alcohol represented by formula Ia or Ib [R<1> is a 1-4C alkyl group; R<2> is a group of formula II (R<3> is hydrogen or a 1-4C alkyl group; a broken line is an additional double bond; and n is 0 or 1-6), hydrogen, or a saturated alkyl group] comprises (a) mono-ethynylating a ketone or formula: R<1> -CO-CH2 -R<2> in ammonia solution by using a basic catalyst, (b) optionally hydrogenating the alcohol of formula Ib on a Pd catalyst, and (c) subjecting the hydrogenated product to a purification distillation, and if necessary, reacting Ia or Ib produced by the steps (a) to (c) or by the steps (a) and (c) with an alkyl acetoacetate of formula IV [R<5> is a 1-4C alkyl group], or a diketene to provide a methyl ketone, and using the ketone as a starting material in the steps (a) to (c).
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