Reaction of ninhydrin with enamino amides of the 3,3-dimethyl-1,2,3,4-tetrahydroisoquinoline series and drotaverine
作者:A. G. Mikhailovskii、D. V. Korchagin、O. V. Gashkova、A. S. Yusov
DOI:10.1134/s1070428016090153
日期:2016.9
ine series, 2-(3,3-dimethyl-1,2,3,4-tetrahydroisoquinolin- 1-ylidene)acetamides, reacted as 1,3-binucleophiles with ninhydrin to form tricyclic tetrahydroindeno[1,2-b]pyrrole system. The nucleophilic centers in the enamines were the amide NH2 group and ß-carbon atom of the enamine fragment. The reaction of ninhydrin with 2-[2,2-dimethyl-2,3-dihydrobenzo[f]-isoquinolin-1(4H)-ylidene]-1-(pyrrolidin-1-yl)ethanone
1,2,3,4-四氢异喹啉系列的“推挽式”烯胺,2-(3,3-二甲基-1,2,3,4-四氢异喹啉-1-亚胺基)乙酰胺,以1,3-反应双亲核试剂与茚三酮形成三环四氢茚并[1,2- b ]吡咯体系。烯胺中的亲核中心是酰胺NH 2基团和烯胺片段的ß-碳原子。茚三酮与2- [2,2-二甲基-2,3-二氢苯并[ f ]-异喹啉-1(4 H)-亚烷基] -1-(吡咯烷基-1-基)乙酮仅涉及烯胺片段的ß-碳原子。通过异喹啉环第3位的两个甲基的空间效应使不同的反应方向合理化。Knoevenagel缩合产物是通过茚三酮与屈花碱(碱)反应制得的。1,3加成产物(3aS,8bS,Z)-2,2-二甲基-2,3-二氢苯并[ f ]异喹啉-4(1 H)-亚烷基} -3a,8b-二羟基的结构通过X射线分析确认了-1,3,3a,8b-四氢茚并[1,2- b ]吡咯-2,4-二酮。