Modular Functionalization of Allenes to Aminated Stereotriads
作者:Christopher S. Adams、Luke A. Boralsky、Ilia A. Guzei、Jennifer M. Schomaker
DOI:10.1021/ja304859w
日期:2012.7.4
Nitrogen-containing stereotriads, compounds with three adjacent stereodefined carbons, are commonly found in biologically important molecules. However, the preparation of molecules bearing these motifs can be challenging. Herein, we describe a modular oxidation protocol which converts a substituted allene to a triply functionalized amine of the form C-X/C-N/C-Y. The key step employs a Rh-catalyzed intramolecular conversion of the allene to a strained bicyclic methylene aziridine. This reactive intermediate is further elaborated to the target products, often in one reaction vessel and with effective transfer of the axial chirality of the allene to point chirality in the stereotriad.
BICYCLIC METHYLENE AZIRIDINES AND REACTIONS THEREOF
申请人:Wisconsin Alumni Research Foundation
公开号:US20160075668A1
公开(公告)日:2016-03-17
The oxidative functionalization of olefins is a common method for the formation of vicinal carbon-heteroatom bonds. However, oxidative methods to transform allenes into synthetic motifs containing three contiguous carbon-heteroatom bonds are much less developed. The use of bicyclic methylene aziridines (MAs), prepared via intramolecular allene aziridination, as scaffolds for functionalization of all three allene carbons, among other reactions, is described herein.