Stereocontrolled Elongation of a Functionalized Isoprene Unit on theEorZTerminal Methyl of TerpenoidsviaN-Ylide Rearrangement of the Common Ammonium Salts
摘要:
在选定的反应条件下,通过普通铵盐的 N-酰化重排,实现了萜类化合物 E 或 Z 端甲基上的官能化异戊二烯单元的立体可控伸长。重排产物之一,全-(E)-倍半萜羧酸酯被转化成了中国橘子精油的一种成分--β-西尼萨。对这些转化的一般方面进行了描述。
of a functionalized isopreneunit on the E or Z terminal methyl of terpenoids was achieved by N-ylide rearrangement of the common ammonium salts under selected reaction conditions. A 1,5-diene or conjugated triene skeleton can be furnished by reductive or oxidative removal of the amino group of the rearrangement product, respectively. As an application to natural-product synthesis, all-(E)-terpenoid