A new bipiperidine-based manganese catalyst is introduced, which catalyzes the chemoselective benzylic oxidation of a wide range of diverse functionalized alkyl arenes with H2O2, affording various functionalized aryl ketones, cyclic imines, and bioactive molecules under mild conditions in a short time.
Asymmetric aldol reactions were studied in the presence of heterocyclic bimorpholine- and bipiperidine-type organocatalysts. Bimorpholine derivatives were found to be more reactive and more selective in intramolecular, as well as intermolecular, reactions. (c) 2008 Elsevier Ltd. All rights reserved.
SATO, MITSUNOBU;SATO, YOICHI;YANO, SHIGENOBU;YOSHIKAWA, SADAO, J. CHEM. SOC. DALTON TRANS., 1985, N 5, 895-898
Chiral Phosphoramide-Catalyzed Enantioselective Addition of Allylic Trichlorosilanes to Aldehydes. Preparative Studies with Bidentate Phosphorus-Based Amides
作者:Scott E. Denmark、Jiping Fu、Michael J. Lawler
DOI:10.1021/jo052203h
日期:2006.2.1
that more than one Lewis basic moiety (phosphoramide) is involved in the rate- and stereochemistry-determining step of enantioselectiveallylation, bidentate chiral phosphoramides were developed. Different chiral phosphoramide moieties were connected by tethers of methylene chains of varying length. The rate and enantioselectivity of allylation with allyltrichlorosilane promoted by the bidentate phosphoramides