Conformational energetics of sugar thioureas and synthesis of glycosyl thioureido sugars
作者:JoséM. García Fernández、Carmen Ortiz Mellet、Víctor M. Díaz Pérez、JoséL. Jiménez Blanco、José Fuentes
DOI:10.1016/0040-4020(96)00673-4
日期:1996.9
of the reaction of 6-deoxy-6-isothiocyanatoaldopyranoside derivatives with ammonia depend strongly on the nature of the hydroxyl protecting groups and solvent. In pyridine as solvent, the expected thioureas are obtained as the sole reaction products. A marked preference for the E configuration at the sugarNHC(S) bond is observed for silylated as compared to acetylated derivatives. Rotational barrier