The reaction of trifluoroacetyl amides with Grignard reagent for the substitution of CF3 group with various alkyl or arylgroups is described. A variety of aryl, quinolin-8-yl, and (hetero)alkyl functional groups as well as F, Cl, and Br atoms are well tolerated. These moisture-stable and easily available trifluoroacetyl amides can be conveniently obtained and used as new versatile precursors for isocyanates