New approach to synthesis of 4-arylcoumarin derivatives
摘要:
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.
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.