作者:Bing Ma、Dmitry N. Litvinov、Liwen He、Biplab Banerjee、Steven L. Castle
DOI:10.1002/anie.200902425
日期:2009.8.3
Crazy cross‐links: The first totalsynthesis of a member of the celogentin/moroidin family of antimitotic bicyclic peptides features a Knoevenagel condensation–radical conjugate addition sequence to install the LeuTrp cross‐link and an indole–imidazole oxidative coupling to fashion the TrpHis cross‐link (see structure).
Total Synthesis of the Antimitotic Bicyclic Peptide Celogentin C
作者:Bing Ma、Biplab Banerjee、Dmitry N. Litvinov、Liwen He、Steven L. Castle
DOI:10.1021/ja909870g
日期:2010.1.27
An account of the totalsynthesis of celogentin C is presented. A right-to-left synthetic approach to this bicyclic octapeptide was unsuccessful due to an inability to elaborate derivatives of the right-hand ring. In the course of these efforts, it was discovered that the mild Braslau modification of the McFadyen-Stevens reaction offers a useful method of reducing recalcitrant esters to aldehydes.