Stereoselective Synthesis of 3-Substituted Ethyl (<i>Z</i>)-4,4,4-Trifluoro-2-formylamino-2-butenoates
作者:Dieter Enders、Zai-Xin Chen、Gerhard Raabe
DOI:10.1055/s-2004-834922
日期:——
The straightforward and completely (Z)-stereoselective synthesis of various 3-substituted ethyl 4,4,4-trifluoro-2-formyl-amino-2-butenoates, useful dehydro amino acid precursors of β-trifluoromethyl substituted amino acids, is described. Key step is the Schollkopf formylamino-methylenation protocol starting from ethyl isocyanoacetate and trifluoromethyl ketones.