Synthesis of macrocyclic terpenoids by intramolecular carbonyl coupling: flexibilene and humulene
作者:John E. McMurry、James R. Matz、Kenneth L. Kees
DOI:10.1016/s0040-4020(01)87732-2
日期:1987.1
Total syntheses of two macrocyclic sesquiterpene hydrocarbons, humulene (1) and flexibilene (2) are discussed in detail. Both were prepared in high overall yield by titanium-induced cyclization of the appropriate keto aldehyde precursors (4 and 9, respectively), themselves obtained by coupling of the vinylic zirconium reagent 22 with pi-allylpalladiums 26 and 23.
2大环倍半萜烃类,葎草烯(的全合成1)和flexibilene(2)进行了详细讨论。两者都是通过钛诱导的适当的酮醛前体(分别为4和9)的环化反应而以高总收率制备的,它们本身是通过乙烯基锆试剂22与pi-allpalladiums 26和23偶联而获得的。