The multicomponent synthesis of diarylmethylamines, 1,2-diarylethylamines and beta-arylethylamines has been undergone starting from aryl- or benzylzinc reagents, aldehydes, and primary or secondary chiral amines. Good to high diastereoselectivities have been obtained from both L-proline ester derivatives 1 and (+/-)-trans-1-allyl-2,5-dimethylpiperazine (4). The use of R-(+)-1-phenylethylamine (7) provides important diastereoisomeric excesses (similar to 60%) in conjunction with very high chemical yields. This work constitutes a preliminary entry to the intended development of a more flexible reaction system, involving easily cleavable chiral amines. (C) 2010 Elsevier Ltd. All rights reserved.
Deoxy-Arylation of Amides via a Tandem Hydrosilylation/Radical– Radical Coupling Sequence
作者:Nicholas J. Venditto、Jeffrey A. Boerth
DOI:10.1021/acs.orglett.4c01121
日期:——
for single electron reduction to generate α-amino radicals. Leveraging the ability to generate α-amino radicals from these hemiaminals, we describe a two-step, one-pot, deoxy-arylation of amides utilizing iridium-catalyzed hydrosilylation and photoredox catalysis. This transformation can be tailored toward the late-stage functionalization of biologically relevant molecules, with drug discovery applications