Highly stereoselective synthesis of steroidal 2,5-diketopiperazines based on isocyanide chemistry
作者:Andrea C. Bruttomesso、Javier Eiras、Javier A. Ramírez、Lydia R. Galagovsky
DOI:10.1016/j.tetlet.2009.03.219
日期:2009.7
In this Letter we report that the Ugi reaction/cyclization sequence on a steroidal 17-carboxaldehyde leads to novel steroidal 2,5-diketopiperazines with a noteworthy stereoselectivity. A wide variety in the substitution pattern in the heterocyclic moiety was easily achieved by changing the components in the Ugi reaction.