Journal
TETRAHEDRON LETTERS
Volume 54, Issue 6, Pages 470-473Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2012.11.055
Keywords
Organocatalysis; Bronsted acid; Ketimine; Catecholborane; Reduction
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The first asymmetric reduction of ketimines with catecholborane employing an enantiopure N-triflyl phosphoramide as the organocatalyst has been developed. Five mole % of the catalyst provides the corresponding secondary amines in very good to almost quantitative yields and good enantioselectivities up to 86:14 e.r. under mild reaction conditions. (C) 2012 Elsevier Ltd. All rights reserved.
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