S 98 Synthesis of Assemblies of Isoxazole and Azoles Based on 1,3-Dipolar Cycloaddition Reaction of Enamines with Nitrile Oxides = Cинтез ансамблей изоксазолов c азолами в реакции 1,3-диполярного циклоприсоединения енаминов к нитрилоксидам / I. Efimov, Yu. Shafran, N. N. Volkova, N. Beliaev, P. A. Slepukhin, V. A. Bakulev // Chemistry of Heterocyclic Compounds. - 2016. - Vol. 52, № 9. - С. 743-749. - Bibliogr. : p. 748-749 (32 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ENAMINES -- ISOXAZOLES -- HYDROXAMOYL CHLORIDES Аннотация: 2-(1,2,3-Thiadiazol-5-yl)enamines and 3-(1,2,3-triazol-4-yl)enaminones react with arylhydroxamoyl chlorides at room temperature with the exclusive formation of 3-aryl-4-(1,2,3-thiadiazol-5-yl)- and [4-(1,2,3-triazol-4-yl)carbonyl]isoxazoles in high yields. The proposed mechanism includes in situ generation of nitrile oxides, which participate in the (3+2)-dipolar cycloaddition reactions leading to the formation of the isoxazole ring. \\\\expert2\\NBO\\Chemistry of Heterocyclic Compounds\\2016, v.52, N 9, p. 743-749.pdf |