A highly efficient stereoselective synthesis of β-lactams
作者:Sandeep Goyal、Anang Pal、Mangilal Chouhan、Mukesh Gangar、Sharad Sarak、Vipin A. Nair
DOI:10.1016/j.tetlet.2016.12.033
日期:2017.1
An efficient strategy for a one-pot, single step synthesis of β-lactams employing an imidazolidinone based chiral auxiliary with various aldimines via asymmetric Mannich-type reaction has been described.
polymethylhydrosiloxane (PMHS) as well as certain amounts of appropriate alcohol and base additives, the non-precious metal copper-catalyzed asymmetric 1,4-hydrosilylation of β-aryl or β-alkyl-substituted N-aryl β-enamino esters was well realized to afford a diverse range of N-aryl β-aminoacid esters in high yields and excellent enantioselectivities (26 examples, 90–98% ee). This approach tolerated the handling of