Enantioselective Cyclopropanation of Indoles: Construction of All-Carbon Quaternary Stereocenters
作者:Gülsüm Özüduru、Thea Schubach、Mike M. K. Boysen
DOI:10.1021/ol302388t
日期:2012.10.5
The first enantioselective copper-catalyzed cyclopropanation of N-acyl indoles is described. Using carbohydrate-basedbis(oxazoline) ligands (glucoBox), the products were obtained in up to 72% ee. Cyclopropanation of N-Boc 3-methyl indole yielded a product with an all-carbon quaternary stereocenter, which is a valuable building block for the synthesis of indole alkaloids: Deprotection and rearrangement