It was established that the initial condensation of substituted 6-aminoindoles and oxaloacetic ester in boiling benzene with the addition of catalytic amounts of acetic acid takes place exclusively through the carboxyl group of the keto ester with the formation of the corresponding enamines, which successfully undergo thermal cyclization (biphenyl, 280 degrees C) to pyrroloquinolines. Here, irrespective of the nature of substituents at the N-1 and C-5 atoms enamines with a free position 7 are transformed into pyrrolo-[2,3-f]quinolines (structural analogs of vitamin PQQ) while 7-OMe-substituted enamines give pyrrolo[3,2-g]quinolines with linear fusion of the rings.
Chloroacetates of Substituted 1H-Indol-5-,6-,7-Ylamines and Their Antimicrobial Activity
作者:S. A. Yamashkin、I. S. Stepanenko、A. I. Kiryutina、T. N. Platkova
DOI:10.1007/s11094-024-03047-8
日期:2024.1
reaction of substituted 1H-indol-5-, 6-, 7-ylamines with chloroaceticacid; identified based on PMR, UV, and mass spectra; and screened in the laboratory for antimicrobial activity. All the tested compounds could suppress the growth of microorganism test strains at various minimum inhibitory concentrations (MICs). The MIC values were observed to depend on the nature and pattern of substitution on the indole
由取代的1H-吲哚-5-,6-,7-基胺与氯乙酸反应得到水溶性1H-吲哚-5-,6-,7-基氯乙酸铵;基于 PMR、UV 和质谱进行鉴定;并在实验室进行抗菌活性筛选。所有测试的化合物都能在不同的最低抑制浓度(MIC)下抑制微生物测试菌株的生长。观察到 MIC 值取决于吲哚系统取代的性质和模式。
The potential use of 6-amino-5-methoxy(methyl)-2,3-dimethyl-and 6-amino-5-methoxy(methyl)-1,2,3-trimethyl-indoles in the synthesis of pyrrolo[2,3-f]quinolines
作者:S. A. Yamashkin、E. A. Oreshkina、I. S. Romanova、M. A. Yurovskaya