New heterocyclic derivatives of trifluoroalanine

A new method of the synthesis of heterocyclic derivatives of trifluoroalanine based on the cyclocondensation of methyl trifluoropyruvate tert-butoxycarbonylimine with C,N- and N,N-binucleophiles, like Nsubstituted ureas, 1-benzyl-6-aminouracil, benzamidine, and 3-aminocrotononitrile, followed by hydrolysis of the resulting Boc-derivatives to 5-amino-5-trifluoromethylimidazolidine-2,4-diones, 5-amino-5-trifluoromethyl-1-benzyl-5,7-dihydropyrrolo[2,3-d]-pyrimidine-2,4,6-3H-trione, 4-amino-2-methyl-5-oxo-4-(trifluoromethyl)-4,5-dihydro-1H-pyrrole-3-carbonitrile, or 5-amino-5-trifluoromethyl-2-phenyl-3,5-dihydroimidazol-4-one, respectively, was developed.