Efficient Synthesis and Some Transformations of 1-Hydrazinyl-5,6,7,8-tetrahydroisoquinolines Involving Rearrangement of the Pyridine Ring
作者:E. G. Paronikyan、Sh. Sh. Dashyan、S. S. Mamyan、R. A. Tamazyan、A. G. Ayvazyan
DOI:10.1134/s1070428019090148
日期:2019.9
was developed for the synthesis of 1-hydrazinyl-3-arylamino-5,6,7,8-tetrahydroisoquinoline- 4-carbonitriles via recyclization of the pyridine ring in 3-amino-2-aryl-1-sulfanylidene-1,2,5,6,7,8- hexahydroisoquinoline-4-carbonitriles by the action of hydrazine hydrate. The recyclization products were converted to new heterocyclic systems, 7,8,9,10-tetrahydro[1,2,4]triazolo[3,4-a]isoquinolines and 1-(3
-开发了一种通过在3-氨基-2-芳基-1-亚磺酰基-1中吡啶环的再循环来合成1-肼基-3-芳基氨基-5,6,7,8-四氢异喹啉-4-腈的程序在水合肼的作用下,生成2,5,6,7,8-六氢异喹啉-4-腈。循环产物被转化为新的杂环系统,即7,8,9,10-四氢[1,2,4]三唑并[3,4- a ]异喹啉和1-(3,5-二甲基-1 H-吡唑-1-基)-5,6,7,8-四氢异喹啉,分别与原甲酸三乙酯和乙酰丙酮反应。用叠氮化钠在乙酸中处理1-肼基-3-芳基氨基-5,6,7,8-四氢异喹啉-4-甲腈得到1-叠氮基-3-芳基氨基-5,6,7,8-四氢异喹啉-4-碳腈,以及后者的叠氮-四唑异构体。发现叠氮化物-四唑平衡的状态取决于芳基氨基中的溶剂极性和取代基性质。通过X射线分析确认了5-(2-甲氧基苯胺基)-7,8,9,10-四氢[1,2,4]三唑并[3,4- a ]异喹啉-6-甲腈的结构,并且是分子间的