C3-symmetric tripodal tetra-amines—preparation from chiral amino alcohols via aziridines
摘要:
Enantiopure N-sulfonylaziridines, conveniently obtained from readily available enantiopure amino alcohols, undergo smooth ring opening reactions using ammonia as a nucleophile to yield tripodal tetradentate C-3-symmetric amines. N-alkylation and subsequent removal of the sulfonyl groups provide access to alkyl-substituted analogs. (C) 1997 Elsevier Science Ltd.
C3-symmetric tripodal tetra-amines—preparation from chiral amino alcohols via aziridines
摘要:
Enantiopure N-sulfonylaziridines, conveniently obtained from readily available enantiopure amino alcohols, undergo smooth ring opening reactions using ammonia as a nucleophile to yield tripodal tetradentate C-3-symmetric amines. N-alkylation and subsequent removal of the sulfonyl groups provide access to alkyl-substituted analogs. (C) 1997 Elsevier Science Ltd.
Highly Practical and Enantioselective Cu-Catalyzed Conjugate Addition of Alkylzinc Reagents to Cyclic Enones at Ambient Temperature
作者:Isaac J. Krauss、James L. Leighton
DOI:10.1021/ol034983r
日期:2003.9.1
[GRAPHICS]A new ligand for Cu-catalyzed enantioselective additions of dialkylzincs to cyclic enones has been developed. In addition to providing good to excellent enantioselectivities with a range of cyclic enones and dialkylzincs, the ligand has several notworthy features: it can be readily prepared in just two steps, is an air-stable crystalline solid, and provides optimal performance at ambient temperature.
C3-symmetric tripodal tetra-amines—preparation from chiral amino alcohols via aziridines
Enantiopure N-sulfonylaziridines, conveniently obtained from readily available enantiopure amino alcohols, undergo smooth ring opening reactions using ammonia as a nucleophile to yield tripodal tetradentate C-3-symmetric amines. N-alkylation and subsequent removal of the sulfonyl groups provide access to alkyl-substituted analogs. (C) 1997 Elsevier Science Ltd.