Journal
ADVANCED SYNTHESIS & CATALYSIS
Volume 355, Issue 10, Pages 1937-1942Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.201300352
Keywords
amino acids; BrOnsted acids; catecholborane; organocatalysis; phosphoric acids; reduction
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The chemo- and enantioselective reduction of alpha-imino esters with catecholborane has been developed employing 10 mol% of an enantiopure BINOL-based phosphoric acid as organocatalyst. Various differently substituted aromatic alpha-amino acid derivatives can be achieved in almost quantitative yields and very good to excellent enantioselectivities of up to 96% ee under mild reaction conditions.
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