S 45 Self condensation of enamines mediated by acetylation. A novel approach to 1-(azol-5-yl)-(1E,3Z)-butadiene-4-N,N-dimethylamines / Yu. Shafran, Yu. A. Rozin, T. Beryozkina, S. Zhidovinov, O. S. Eltsov, J. O. Subbotina, J. Leban, R. K. Novikova, V. A. Bakulev // Organic and Biomolecular Chemistry. - 2012. - Vol.10. - С. 5795-5798. - Bibliogr. : p. 5798 (15 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ENAMINES -- 1,3-DIENES -- STEREOSELECTIVE SYNTHESIS Аннотация: Novel self-condensation of 3-(azol-5-yl)-1,1-dimethylenamines has been found to form new C–C bonds leading to 2,4- (1,2,3-triazole-1,2,3-thiadiazole-3-phenylisothiazole)-(1E,3Z)- 5-yl-butadiene-1-amines. The discovered reaction represents a new example of C–H functionalization in unsaturated systems and can serve an efficient synthetic approach to rational design of new 2,4-(diazole-5-yl)-dieneamines \\\\expert2\\NBO\\Organic and Biomolecular Chemistry\\2012, v. 10, p.5795.pdf |
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 |