Journal
TETRAHEDRON LETTERS
Volume 59, Issue 16, Pages 1596-1599Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2018.03.031
Keywords
Ultrasound-GBBR; Bis-heterocycles; Carbazole; Imidazo[1,2-a]pyridine; Green catalyst and green synthesis
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Funding
- CONACYT [DAIP-UG (859/2016), CONACYT (CB-2016-285622)]
- CONACYT-Mexico [632715/338546, 636753/573230, 707677/582770]
- Laboratorio Nacional de Caracterizacion de Propiedades Fisicoquimicas y Estructura Molecular (CONACYT-Mexico) [123732]
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A series of seventeen novel 3-imidazo[1,2-alpha]pyridine carbazoles bound type bis-heterocycles were synthesized by Ultrasound irradiation (USI) assisted Groebke-Blackburn-Bienayme reaction (GBBR), by employing ammonium chloride (10 mol%) as a catalyst in excellent yields (90-96%). This new, efficient and mild protocol has silent features such as green inexpensive and easily available catalyst and solvent at room temperature. (C) 2018 Elsevier Ltd. All rights reserved.
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