Synthesis of <i>cis-</i>4-Trifluoromethyl- and <i>cis</i>-4-Difluoromethyl-<scp>l</scp>-pyroglutamic Acids
作者:Xiao-Long Qiu、Feng-Ling Qing
DOI:10.1021/jo034098m
日期:2003.5.1
Efforts to synthesize 4-trifluoromethyl- and 4-difluoromethyl-L-pyroglutamic acids are described. After many arduous efforts, we successfully synthesized our target molecules cis-4-trifluoromethyl-L-pyroglutamic acid 25 and cis-4-difluoromethyl-L-pyroglutamic acid 26 from trams-4-hydroxy-L-proline through oxidation of fluorinated prolinates with RuO4.