Journal
ORGANIC LETTERS
Volume 8, Issue 14, Pages 3045-3048Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol060984i
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[GRAPHICS] (L)-Piperazine-2-carboxylic acid derived N-formamides have been developed as highly enantioselective Lewis basic catalysts for the hydrosilylation of N-aryl imines with trichlorosilane. The arene sulfonyl group on N4 was found to be critical for the high enantioselectivity of the catalyst. High isolated yields (up to 99%) and enantioselectivities (up to 97%) were obtained for a broad range of substrates, including aromatic and aliphatic ketimines, particularly those with R-2 as relatively bulky alkyl groups.
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