A series of axially chiral biscarboline-based sulfones were synthesized from L-tryptophane and applied for enantioselective 1,2-transfer hydrogenations of ketimines using trichlorosilane. The catalyst 4e, which had a tertiary butyl group, exhibited a good conversion and high enantioselectivities up to 96%ee in the series of reactions. (C) 2019 Elsevier Ltd. All rights reserved.
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作者:Spirkova, Katarina、Kovac, Jaroslav、Konecny, Vaclav、Dandarova, Miloslava、Cernayova, Marta
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Zemlyanskii,N.I. et al., Journal of general chemistry of the USSR, 1966, vol. 36, # 7, p. 1255 - 1258
作者:Zemlyanskii,N.I. et al.
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Studies in Silico-Organic Compounds. XXV. The Preparation of Sila-Alkyl Sulfides