Acetylenic carbinols, their use as starting compounds in the synthesis of beta-damascenon and allenic carbinols as intermediates in said synthesis, and process for their preparation

摘要

New acetylenic and allenic carbinols of formula IMAGE respectively, wherein symbol R stands for a trialkyl-silyl or a C1 to C6 alkyl radical, preferably a methyl, a tert-butyl or an isoamyl radical, or a group of formula IMAGE (II) wherein, when taken separately, each of symbols R1 and R2 represents a lower alkyl radical or, when taken together, R1 and R2 represent a tetramethylene group, are useful intermediates for the preparation of beta -damascenone.