Grubbs' RCM in the Total Synthesis of the Microtubule Stabilizing Drug Laulimalide
作者:Johann Mulzer、Elisabeth Öhler、Valentin S. Enev、Martin Hanbauer
DOI:10.1002/1615-4169(200208)344:6/7<573::aid-adsc573>3.0.co;2-c
日期:2002.8
Two independent syntheses of the microtubule stabilizing antitumor agent laulimalide are described, which mainly differ with respect to the macrocyclization step. The first synthesis employs a Still-Gennari olefination and the second one an Alexakis-type, allylsilane/acetal addition to close the final ring. For the construction of the dihydropyran subunits, RCM methodology and alternative strategies are presented in comparison.