Synthesis and Reactivity of Unique Heterocyclic Structures en Route to Substituted Diamines
摘要:
Rhodium-catalyzed oxidative cyclization of allylic hydroxylamine-derived sulfamate esters furnishes a novel family of bicyclic aziridines that serve as functional precursors to substituted diamines. Investigations with the N4-Troc form of these heterocycles have led to manifold improvements in reaction performance and scope and have revealed unique differences in the stability and reactivity of such compounds dictated by the choice of N4-protecting group.
Synthesis and Reactivity of Unique Heterocyclic Structures en Route to Substituted Diamines
作者:David E. Olson、Autumn Maruniak、Sushant Malhotra、Barry M. Trost、J. Du Bois
DOI:10.1021/ol2010769
日期:2011.7.1
Rhodium-catalyzed oxidative cyclization of allylic hydroxylamine-derived sulfamate esters furnishes a novel family of bicyclic aziridines that serve as functional precursors to substituted diamines. Investigations with the N4-Troc form of these heterocycles have led to manifold improvements in reaction performance and scope and have revealed unique differences in the stability and reactivity of such compounds dictated by the choice of N4-protecting group.
Synthesis of Differentially Substituted 1,2-Diamines through Advances in C–H Amination Technology
作者:David E. Olson、D. Allen Roberts、J. Du Bois
DOI:10.1021/ol302895f
日期:2012.12.21
A general, high yielding method for the synthesis of 1,2-diamine derivatives is described that capitalizes on selective, rhodium-catalyzed C–H insertion of hydroxylamine-based sulfamateesters. The resulting Troc-protected oxathiadiazinane heterocycles are easily modified and can be reduced under the mild action of NaI to afford differentially substituted diamine products. This technology offers a