cyclization of germacrone with HSO3Cl at −78 °C by means of a concerted and regioselective mechanism gives rise to a bicyclo[6.2.0]decan-2-ylium intermediate ion, which evolves to unusual skeletons through subsequent cyclization and Wagner−Meerwein rearrangements. This novel germacra-1(10),4-diene cyclization could suggest the existence of a new biosynthetic pathway to sesquiterpenes.
通过协同和区域选择性机制,在−78°C下用HSO 3 Cl对
环戊酮进行环环化,产生双环[6.2.0] decan-2-ylium中间离子,该环离子通过随后的环化和Wagner演变成不寻常的骨架-Meerwein重排。这种新颖的germacra-1(10),4-二烯环化反应可能表明
倍半萜有新的
生物合成途径。