Вид документа : Статья из журнала Шифр издания : 54/A 10 Автор(ы) : Efimov I., Beliaev N., Beryozkina T., Slepukhin P. A., Bakulev V. A. Заглавие : A catalyst and additive-free three-component reaction of highly electrophilic azides with cyclic ketones and cycloaliphatic amines. Synthesis of novel N-heteroaryl amidines [Электронный ресурс] Место публикации : Tetrahedron Letters. - 2016. - Vol. 57, № 18. - С. 1949-1952 Систем. требования: http://apps.webofknowledge.com/full Примечания : 03.11.16 ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): sulfonyl amidines; --ketene n,x-acetals--cycloaddition reactions Аннотация: Highly electrophilic 5-azido-1-methyl-4-nitro-1H-imidazole and sulfonyl azides were demonstrated to react with alicyclic amines and cyclic ketones in the absence of any catalyst or additive to afford novel N-(4-nitroimidazol-5-yl)- or N-sulfonylamidines respectively. Based on single crystal X-ray analysis, a revision of the previously reported data of Gao and co-workers on the direction of the reaction of sulfonyl azides with endocyclic enamines was made. The reaction of 2,6-diazidopyridine with an enamine, 4-(cyclohex-1-en-l-yl)morpholine, proceeded with cyclization of the azide moiety onto the pyridine C=N bond to form an amidine bearing the tetrazolo[1,5-a]pyridine fragment. Доп.точки доступа: Efimov, I.; Beliaev, N.; Beryozkina, T.; Slepukhin, P. A.; Bakulev, V. A.