Convergent stereospecific total synthesis of monocillin I and radicicol: some simplifications and improvements
作者:Isabelle Tichkowsky、Robert Lett
DOI:10.1016/s0040-4039(02)00713-x
日期:2002.5
A much improved and reliable access to the macrolide 9, key-intermediate in our synthesis of monocillin I and radicicol is reported, via a modification of our first synthesis. The formation of the conjugated E.Z-dienone trans-epoxide is now achieved in a much higher yield, in a stereospecific reaction, by elimination of the methanesulfonate ester of the 6'-OH of the intermediate macrolide. It is also shown that the configuration of the 6'-OH has no significant incidence on all the steps leading to 9, and that consequently the two diastereoisomers 12, epimeric at 6', can be used for the synthesis of radicicol. (C) 2002 Elsevier Science Ltd. All rights reserved.