Aromatization and ring cyclization: A reasonable understanding on the ring cyclization mechanism of 3-amino-6-hydrazino-1,2,4-triazin-5(2<i>H</i>)-one reacted with one-carbon fragment reagents or nitrous acid
作者:Long-Chih Hwang、Chun-Hsien Tus、Jung-Hui Wang
DOI:10.1002/jhet.5570430412
日期:2006.7
The cyclization mechanism for the title compound (2) reacting with one-carbon fragment reagents or nitrous acid to afford heterobicyclic compounds 6-amino-3-substituted-1,2,4-triazolo[3,4-f][1,2,4]triazin-8(7H)-ones (3a∼d) or 6-amino-1,2,3,4-tetrazolo[5,1-f][1,2,4]triazin-8(7H)-one (4), respectively, is explored in this paper. When 3-amino-2-benzyl-6-hydrazino-1,2,4-triazin-5(2H)-one (10), the N-2
标题化合物(2)与一碳片段试剂或亚硝酸反应生成杂双环化合物6-氨基-3-取代-1,2,4-三唑[3,4- f ] [1,2]的环化机理,4] triazin-8(7 H)-ones(3a〜d)或6-氨基-1,2,3,4-tetrazolo [5,1- f ] [1,2,4] triazin-8(7本文分别探讨了H)-一(4)。当3-氨基-2-苄基-6-肼基-1,2,4-三嗪-5(2 H)-one(10)时,在相同条件下处理2的N-2苄基化衍生物,环环化不会发生 而是3-氨基-2-苄基-6-取代的1,2,4-三嗪-5(2 H形成一个(11,12,14)和2- N-(2-氨基-1-苄基-4-氧代-1,2,4-三嗪-5-基)半咔唑(13)。或者,当3-氨基-6-肼基-2-[((2-羟基乙氧基)甲基] -1,2,4-三嗪-5(2H)-一(16)时,带有2-[(2 -羟基乙氧基)甲基]侧链在N-2的2由N