S 45 Self-condensation of β-(isoxazol-5-yl) enamines under treatment with acetyl chloride and acids. Synthesis of novel 1,3-diisoxazolyl-1,3-dieneamines and 1,3,5-triisoxazolyl benzenes [Electronic resource] / T. Beryozkina, S. Zhidovinov, Yu. Shafran, O. S. Eltsov, P. A. Slepukhin // Tetrahedron. - 2014. - Vol.70, №25. - С. 3915-3923. - Bibliogr. : p. Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 1,3,5-TRIISOXAZOLYL BENZENES -- DIENEAMINES -- ENAMINES Аннотация: Two directions for self-condensation of β-(isoxazol-5-yl) enamines under treatment with either acetyl chloride or acids were found leading to new 1,3-diisoxazolyl-1,3-dieneamines and 1,3,5-triisoxazolyl benzenes. The effect of solvent, acid, temperature and the reaction time on the ratio of reaction products were investigated. Trans-E-cis configuration of prepared 1,3-diisoxazolyl-1,3-dieneamines was unambiguously confirmed by 2D NMR spectra and X-ray analysis. A new mechanism of 1,3-diisoxazolyl-1,3-dieneamines formation was prop \\\\expert2\\nbo\\Tetrahedron\\2014, v. 70 (25), p. 3915.pdf |