Transformations of 4-arylpyrrolo[1,2-a][1,4]benzodiazepines in three-component reactions with activated alkynes and СН, NH, SH, and ОН acids
摘要:
Three-component reactions of tetrahydropyrrolo[1,2-a][1,4] benzodiazepines with methyl propiolate or acetylacetylene and CH, NH, SH, and OH acids were studied in various solvents. The reaction direction is assumed to depend on the nucleophilicity of anion, formed through deprotonation of acid by the anionic center of initial Michael-type zwitterion.
Synthesis of pyrrolo[1,2-a][1,6]benzodiazonines from pyrrolo[1,2-a][1,4]benzodiazepines and alkynes containing electron-acceptor substituents
摘要:
It has been established that the reaction of pyrrolo[1,2-a][1,4]benzodiazepines with activated alkynes gives pyrrolo[1,2-a][1,6]benzodiazonines as the products of diazepine ring expansion. In the case of pyrrolo[1,2-a][1,4]benzodiazepine, substituted with formyl group at the pyrrole ring, both expansion and cleavage of the diazepine fragment can occur.
Transformation of 4-Substituted Tetrahydro-Pyrrolobenzodiazepines in a Three-Component Reaction With Methyl Propiolate and Indole
作者:L. G. Voskressensky、T. N. Borisova、M. I. Babakhanova、A. A. Titov、T. M. Chervyakova、R. A. Novikov、A. V. Butin、V. N. Khrustalev、A. V. Varlamov
DOI:10.1007/s10593-014-1431-5
日期:2014.3
The three-component reaction of 4-phenyl-, p-methoxyphenyl-, and thienylpyrrolo[1,2-a][1,4]benzo-diazepines with methylpropiolate and indole in dichloromethane proceeds through opening of the diazepine ring. The major transformation products isolated are substituted pyrroles, namely, 1-(2-aminomethylphenyl)-5-(arylmethyl)-2-(indol-1(3)-yl)pyrroles and 1-(2-aminomethylphenyl)-2-aryl-(indol-3-yl)-methylpyrroles
4-二苯基,对甲氧基苯基和噻吩并吡咯并[1,2- a ] [1,4]苯并二氮杂卓与丙酸甲酯和吲哚在二氯甲烷中的三组分反应通过打开二氮杂pine环而进行。分离的主要转化产物是取代的吡咯,即1-(2-氨基甲基苯基)-5-(芳基甲基)-2-(吲哚-1(3)-基)吡咯和1-(2-氨基甲基苯基)-2-芳基-(吲哚-3-基)-甲基吡咯。