N-Salicyl-β-aminoalcohols as a new class of ligand for catalytic asymmetric Strecker reactions |
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Authors: | Woraluk MansawatWorawan Bhanthumnavin Tirayut Vilaivan |
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Institution: | Organic Synthesis Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Patumwan, Bangkok 10330, Thailand |
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Abstract: | An enantioselective Strecker synthesis employing novel chiral titanium complex catalysts derived from structurally simple chiral N-salicyl-β-amino alcohols is described. Reactions of N-benzylidenebenzylamine with trimethylsilyl cyanide in the presence of the catalyst (10 mol%) gave the corresponding α-aminonitrile in good to excellent yields, along with relatively high enantioselectivity (up to 86% ee). Similar reactions with various imines derived from aromatic aldehydes resulted in moderate to good enantioselectivity (44-81% ee). |
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Keywords: | catalytic asymmetric synthesis Strecker imines |
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