1. Addition of pentylmagnesium bromide to 4,4-dimethoxybut-2-enal gave 1,1-dimethoxy-4-hydroxynon-2-ene,resin-catalyzed hydrolysis of which afforded the final product(E)-4-hydroxynon-2-enal in overall yield of 8. 介绍了一种反式-4-羟基-2-壬烯醛的低成本合成方法。