Chiral Mn-salen catalyzed enantiotopic selective CH oxidation of meso-pyrrolidine derivatives
作者:T Punniyamurthy、Akio Miyafuji、Tsutomu Katsuki
DOI:10.1016/s0040-4039(98)80001-4
日期:1998.11
Asymmetric desymmetrization of meso-pyrrolidine derivatives was first effected by enantioselective oxidation of the CH bond α to the nitrogen atom using Mn-salen complex 1b as a catalyst.
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
Asymmetric desymmetrization of meso-pyrrolidine derivatives by enantiotopic selective CH hydroxylation using (salen)manganese(III) complexes
作者:T. Punniyamurthy、Tsutomu Katsuki
DOI:10.1016/s0040-4020(99)00518-9
日期:1999.7
Chiral (salen)manganese(III) complexes 1 catalyzed the asymmetric desymmetrization of N-protectedmeso-pyrrolidine derivatives 3, 6–8, 15 and 18 by enantiotopicselective C-H oxidation in the presence of terminal oxidant iodosylbenzene. The oxidation occurred chemoselectively at the carbon α to the nitrogen atom to afford optically active hydroxypyrrolidine derivatives 9, 11, 13, 16, 19 and 21 that