Total Syntheses of Epothilones A and B via a Macrolactonization-Based Strategy
作者:K. C. Nicolaou、S. Ninkovic、F. Sarabia、D. Vourloumis、Y. He、H. Vallberg、M. R. V. Finlay、Z. Yang
DOI:10.1021/ja971110h
日期:1997.8.1
The total syntheses of epothilones A (1) and B (2) and several analogues thereof are described. The reported strategy relies on a macrolactonizationapproach and features selective epoxidation of the macrocycle double bond in precursors 3 and 4 (Scheme 1), respectively, as well as high convergency and flexibility. Building blocks 9−12 and 15 were constructed by asymmetric processes and coupled via
Epothilone analogues include a molecular scaffold which holds at least one segment of epothilone in a predetermined orientation and which rigidities a region between the macrolactone ring and the aromatic side-chain.