Michael addition of α-azido ketones on iminocoumarin derivatives: an efficient access to new functionalized azido chromenes
摘要:
A facile one-pot synthesis of functionalized azido chromenes was achieved by Michael addition of alpha-azido ketones on iminocoumarin derivatives obtained from salicylaldehydes and malononitrile. Synthesized azido chromenes were successfully transformed into triazolyl chromenes by the [3+2] cycloaddition reaction. (C) 2011 Elsevier Ltd. All rights reserved.
2-亚氨基香豆素-3-腈和2-亚氨基香豆素-3-碳硫代酰胺与2-氨基噻吩-3-碳酰胺的相互作用导致形成3-(4-氧代-3-3,4-二氢噻吩并[2,3- d ]嘧啶-2-基)-2-亚氨基香豆素分两步进行。该方法的简便性以及目标产物的高收率使该方法成为Knoevenagel缩合反应合成3-(4-oxo-3,4-dihydrothienono [2,3- d ]的良好选择)嘧啶-2-基)-2-亚氨基香豆素。J.杂环化学。(2010)。
Recyclization of 2-iminocoumarin-3-carbonitriles with 2-aminothiobenzamide: a new synthetic route to substituted 2-(2-iminocoumarin-3-yl)quinazoline-4(3<i>H</i>)-thiones
作者:Pavlo E. Shynkarenko、Sergiy V. Vlasov、Sergiy M. Kovalenko、Valentin P. Chernykh
DOI:10.1080/17415993.2010.509506
日期:2010.10.1
The reaction of 2-aminothiobenzamide with either 2-iminocoumarin-3-carbonitrile or 2-iminocoumarin-3-thiocarboxamides has been studied. It has been established that in both cases, 2-(2-iminocoumarin-3-yl)quinazoline-4(3H)-thiones are formed as the result of a two-step procedure. The reactions of 2-(2-iminocoumarin-3-yl)quinazoline-4(3H)-thiones with arylamines and alkylating agents have been studied
Facile synthesis of chiral 2-amino-4-(indol-3-yl)-4H-chromene derivatives using thiourea as the catalyst
作者:Yu Gao、Da-Ming Du
DOI:10.1016/j.tetasy.2013.08.018
日期:2013.10
The enantioselective Friedel-Crafts alkylation of indoles with iminochromenes catalyzed by a bifunctional thiourea organocatalyst was investigated. This reaction afforded chiral functionalized 2-amino-4-(indol-3-yl)-4H-chromenes in good yields (up to 87% yield) and with moderate to good enantioselectivities (up to 86% ee). (C) 2013 Elsevier Ltd. All rights reserved.