Journal
TETRAHEDRON-ASYMMETRY
Volume 19, Issue 5, Pages 612-617Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetasy.2008.01.025
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New optically active aminonaphthols were obtained by condensation of 2-naphthol, benzaldehyde and (R)-(+)-1-(1-naphthyl)ethylamine or (R)-(+)-1-(2-naphthyl)ethylamine. Their N-methylated derivatives were also synthesized. The new aminonaphthols 2, 4, 5 and 7 were found to catalyze the enantioselective ethylation of aryl aldehydes to 1-aryl-1-propanots (up to 92% ee). The reactions were accelerated greatly by microwave irradiation. (C) 2008 Elsevier Ltd. All rights reserved.
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