Abstract
The enantioselectivities for the reactions of aliphatic β-substituted β-amino esters [RCH(NH 2)CH 2CO 2Et with R=Me, Et, n-Pr, i-Pr, CHEt 2, cyclohexyl and Ph] with butyl butanoate in neat butyl butanoate and with 2,2,2-trifluoroethyl butanoate in diisopropyl ether were studied in the presence of Candida antarctica lipase A. Enantioselectivities ranging from good ( E=70–100) to excellent ( E>100) were commonly observed, allowing gram-scale resolution of the substrates.
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