General method for the preparation of N-monosubstituted 3-isothiazole and 3-(1,2,5-thiadiazole)amines. Preparation of a new class of 2-substituted 1,2,5-thiadiazol-3(2H)-ones
A novel three-component, one-pot reaction between primary (S)-amino acid amides, aldehydes and isocyanides in the presence of acetic acid yielding substituted2-(cyanomethylamino)-acetamides 4 in good yields, is described. First efforts to investigate the mechanism of this reaction were undertaken.
Several benzophenone-β-turned dipeptide-alkyl chain molecules were prepared. In acetonitrile, intramolecular photochemical reaction of the synthetic molecules was investigated. The photoexcited benzophenone moiety abstracted selectively a hydrogen of the alkyl chain in the molecule. Such a site selectivity showed that the β-turned conformation might be rigid enough for the hydrogen abstraction in the excited state.
General method for the preparation of N-monosubstituted 3-isothiazole and 3-(1,2,5-thiadiazole)amines. Preparation of a new class of 2-substituted 1,2,5-thiadiazol-3(2H)-ones