申请人:BASF Aktiengesellschaft
公开号:US04758548A1
公开(公告)日:1988-07-19
Aliphatic aldehydes of the general formula I ##STR1## where R.sup.1 is hydrogen or methyl, R.sup.2 is a straight-chain or branched alkyl radical of 1 to 4 carbon atoms and the two radicals X are each hydrogen or together form a further C--C bond, in particular 2,5,7,7-tetramethyloctanal, 2,4,5,7,7-pentamethyloctanal, 2-ethyl-5,7,7-trimethyloctanal and 2,5,7,7-tetramethyl-2-octen-1-al, are used in scent compositions and are prepared by a process in which an aldehyde of the general formula II ##STR2## is condensed with an aldehyde of the general formula III ##STR3## in the presence of an aldol condensation catalyst to give the substituted octenal of the general formula I, and, if required, the latter is partially hydrogenated or reduced to give the ocorresponding octanal of the formula I.
通式为I的脂肪族醛类化合物,其中R^1为氢或甲基,R^2为1至4个碳原子的直链或支链烷基基团,两个基团X均为氢或共同形成进一步的C-C键,特别是2,5,7,7-四甲基辛醛,2,4,5,7,7-五甲基辛醛,2-乙基-5,7,7-三甲基辛醛和2,5,7,7-四甲基-2-辛烯-1-醛,用于香气组合物,并通过在醛类通式II和醛类通式III的存在下与醛缩合催化剂缩合,得到通式I的取代辛烯醛,必要时,后者部分加氢或还原以得到相应的辛醛。