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.
The Tsuji–Trost protocol has been successfully employed for the allylicalkylation of preformed lactone enolates. It has been demonstrated that this Pd‐catalyzed reaction can be carried out in an enantio‐ and diastereoselective manner. The use of additives, such as LiCl, was found to be crucial for reaching high levels of product selectivity. For one particular pair of reactants, density functional