Reactivity of Z- and E-isomers of 2-benzamido-3-phenylacrylohydrazide towards some carbon electrophiles. A comparative study
作者:Mohsen K. Abou-Elregal、Ahmed S. A. Youssef、Magdy M. Hemdan、Sandy S. Samir
DOI:10.1080/00397911.2019.1623258
日期:2019.9.17
different relative reactivities towards some carbon electrophiles had been discussed.The Z-isomer underwent cyclization to give imidazole derivative 3 and triazine derivative 4, whereas the latter E-isomer does not undergo such cyclization. The reaction of 2a and/or 2b with 1,2-dibenzylidene hydrazine at different reaction conditions afforded the Schiff bases 6, 8 and the triazolidine derivative 9. Reactions
摘要 2-苯甲酰胺基-3-苯基丙烯酰肼2a、2b的Z-异构体和E-异构体对一些碳亲电试剂具有不同的相对反应性,Z-异构体经过环化得到咪唑衍生物3和三嗪衍生物4,而后者E -异构体不会发生这种环化。2a和/或2b与1,2-二亚苄基肼在不同反应条件下反应得到席夫碱6、8和三唑烷衍生物9。2a、2b与甲酸和邻苯二甲酸酐反应得到不同的环化产物10-分别为 14 个。所有新合成化合物的结构均通过 IR、1H-NMR 和质谱以及元素分析确定。图形概要