A convenient one-pot synthesis of enantiopure (R)-2-amino-3,3,3-trifluoro-2-methyl-N-phenylpropanamide derivatives has been developed. The key step in this synthetic methodology turned out to be the amide formation in which (R)-2-amino-3,3,3-trifluoro-2-methylpropanoic acid hydrochloride was simultaneously protected and activated by Vilsmeier reagent. (C) 2012 Elsevier Ltd. All rights reserved.
Concise Synthesis of Enantiopure α-Trifluoromethyl Alanines, Diamines, and Amino Alcohols via the Strecker-type Reaction
作者:Florent Huguenot、Thierry Brigaud
DOI:10.1021/jo0607717
日期:2006.9.1
by Strecker-type reactions from chiral CF3 imines and iminium proved to be very attractive versatileintermediates for the synthesis of various α-trifluoromethyl amino compounds. From these synthons, both enantiomers of α-trifluoromethyl alanine, trifluoromethyl 1,2-diamines, and amino alcohols were conveniently obtained in enantiopure form in high yields in a few steps.