Synthesis and tautomerization of 6,7-dihydro-(1,2,3)-triazolo[1,5-<i>a</i>]pyrimidines
作者:Sergey M. Desenko、Evgeny S. Gladkov、Svetlana V. Shishkina、Oleg V. Shishkin、Sergey A. Komykhov、Valery D. Orlov、Herbert Meier
DOI:10.1002/jhet.5570430620
日期:2006.11
The condensation of 5-amino-4-phenyl-1,2,3-triazole (1) with chalcones 2a-e or 3-dimethylamino-propiophenone (4f) leads to the 6,7-dihydro-(1,2,3)-triazolo[1,5-a]pyrimidines 3a-f. The equilibrium of 3 and the tautomeric 4,7-dihydro-(1,2,3)-triazolo[1,5-a]pyrimidines 3′ is described.
5-氨基-4-苯基-1,2,3-三唑(1)与查耳酮2a-e或3-二甲基氨基-苯乙酮(4f)缩合生成6,7-二氢-(1,2,3 )-三唑并[1,5 - a ]嘧啶3a-f。描述了3和互变异构体4,7-二氢-(1,2,3)-三唑并[1,5- a ]嘧啶3'的平衡。