Highly efficient conversion of fused 2-amino-4-aryl-4H-chromene-3-carbonitriles into fused 2-oxo-4-aryl-2H-chromene-3-carbonitriles using Vilsmeier conditions
摘要:
A simple, mild, and highly efficient protocol for the synthesis of fused 2-oxo-4-aryl-2H-chromene-3-carbonitriles has been developed starting from fused 2-amino-4-aryl-4H-chromene-3-carbonitriles utilizing Vilsmeier conditions. (C) 2013 Elsevier Ltd. All rights reserved.
Zirconium(IV) Oxychloride: A Simple and Efficient
Catalyst for the Synthesis of Chromen-2-one Derivatives
作者:S. Tasqeeruddin、Yahya I. Asiri、S. Shaheen
DOI:10.14233/ajchem.2020.22849
日期:——
The present work explores a highly efficient, environmental friendly, green protocol for the synthesis of chromen-2-one derivatives (3a-m) by the condensation of salicylaldehydes with various active methylene compounds using zirconium (IV) oxychloride as catalyst. This is a convenient and rapid method for Knoevenagel condensation and this methodology offers several advantages including shorter reaction
Highly efficient conversion of fused 2-amino-4-aryl-4H-chromene-3-carbonitriles into fused 2-oxo-4-aryl-2H-chromene-3-carbonitriles using Vilsmeier conditions
作者:Janardhan Banothu、Ravibabu Velpula、Rajitha Gali、Rajitha Bavantula、Peter A. Crooks
DOI:10.1016/j.tetlet.2013.05.030
日期:2013.7
A simple, mild, and highly efficient protocol for the synthesis of fused 2-oxo-4-aryl-2H-chromene-3-carbonitriles has been developed starting from fused 2-amino-4-aryl-4H-chromene-3-carbonitriles utilizing Vilsmeier conditions. (C) 2013 Elsevier Ltd. All rights reserved.
New approach to synthesis of 4-arylcoumarin derivatives
作者:Ivan N. Bardasov、Anastasiya U. Alekseeva、Oleg V. Ershov、Marina D. Surazhskaya、Andrei V. Churakov、Dmitry A. Grishanov
DOI:10.1016/j.tetlet.2015.09.111
日期:2015.10
A simple and highly efficient new approach for the synthesis of 4-aryl-2-oxo-2H-chromene-3-carbonitriles based on the oxidation and hydrolysis of 2-amino-4-aryl-4H-chromene-3-carbonitriles is described. (C) 2015 Elsevier Ltd. All rights reserved.