A process for the preparation of vitamin A and esters thereof from the condensation of a sulfone of 2-methyl-4-hydroxy-but-2-ene and an activated derivative of 3-methyl-5-(2,6,6-trimethyl-cyclohexen-1-yl)penta-2,4-diene including intermediates therein.
一种从2-甲基-
4-羟基-丁-2-烯磺酰化合物和3-甲基-5-(2,6,6-三甲基-
环己烯-1-基)戊-2,4-二烯激活衍
生物的缩合反应中制备
维生素A及其
酯类的方法,包括其中间体。