作者:Norton P. Peet、Shyam Sunder、Robert J. Barbuch
DOI:10.1002/jhet.5570200304
日期:1983.5
Treatment of 5-amino-1-(2-aminophenyl)-1H-pyrazole-4-carbonitrile (15) with triethyl orthoformate produces 6H-pyrazolo[2,3-a][1,3,5]benzotriazepine-3-carbonitrile (16). Other members of this novel ring system result from treating 15 with triethyl orthoacetate and triethyl orthopropionate. These latter reactions, which yield homologs 17 and 19, respectively, of 16, also produce acyclic Schiff bases
用原甲酸三乙酯处理5-氨基-1-(2-氨基苯基)-1 H-吡唑-4-腈(15)产生6 H-吡唑并[2,3- a ] [1,3,5]苯并三氮杂-3 -腈(16)。该新颖的环系统的其他成员是通过用原乙酸三乙酯和原丙酸三乙酯处理15得到的。后面这些反应分别产生16的同系物17和19,也产生无环的席夫碱。这些席夫碱是在确定pyrazolobenzotriazepines三氮双键的位置有用的16,17和19,使用13C nmr光谱。