A process for the manufacture of 2,6,6-trimethyl-cyclo-hex-2-en-1-one by reacting 3-alkoxy-4-methyl-3-pentene or 3-alkoxy-4-methyl-2-pentene or a mixture of these compounds with acrolein, and reacting the resulting 2-alkoxy-2-ethyl-3,3-dimethyl-2,3-dihydro-4H-pyran with acids. The product is an intermediate for numerous syntheses of scents. Furthermore, a number of carotenoid syntheses are based on 2,6,6-trimethyl-cyclohex-2-en-1-one or its hydrogenation product, 2,6,6-trimethyl-cyclohexan-1-one.
一种制备
2,6,6-三甲基环己-2-烯-1-酮的方法,包括将3-烷氧基-4-甲基-3-
戊烯或3-烷氧基-4-甲基-
2-戊烯或这些化合物的混合物与
丙烯醛反应,然后将得到的2-烷氧基-2-乙基-3,3-二甲基-2,3-二氢-
4H-吡喃与酸反应。该产品是许多香味合成的中间体。此外,许多类
胡萝卜素的合成都基于
2,6,6-三甲基环己-2-烯-1-酮或其氢化产物2,6,6-三甲基环己基-1-酮。