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.
Iodine mediated synthesis of coumarins from chromenes
作者:Himanshu Sharma、Mohini Mourya、Lokesh K. Soni、Debanjan Guin、Yogesh C. Joshi、Mahaveer P. Dobhal、Ashok K. Basak
DOI:10.1016/j.tetlet.2015.11.019
日期:2015.12
Iodine mediated rapid conversion of 2-amino-3-cyano-4-aryl-4H chromenes to the corresponding coumarins in the presence of water is described. Several chromenes are obtained in high yields without chromatographic purification. Under anhydrous conditions, 2-iminochromenes are obtained as major products. (C) 2015 Elsevier Ltd. All rights reserved.