The total synthesis of a potent multi-drug-resistant reverser, dysoxylacatam A (1), was achieved in a highly efficient and stereocontrolled fashion. The highlights of the strategy enlisted an iterative combination of lithiation-borylation tactics including Aggarwal homologation and Matteson homologation, Brown crotylation, Krische allylation, and ring-closingmetathesis to forge the macrocycle.
作者:Andreas Ahlers、Teresa de Haro、Barbara Gabor、Alois Fürstner
DOI:10.1002/anie.201510026
日期:2016.1.22
An efficient entry into the phosphorylated marine macrolide enigmazole A is described. Enigmazole A interferes with c‐Kit signaling by an as yet unknown mode of action and is therefore a potential lead in the quest for novel anticancer agents. Key to success is a gold‐catalyzed cascade comprising a [3,3]‐sigmatropic rearrangement of a propargyl acetate along the periphery of a macrocyclic scaffold