Synthesis of 1,3-Benzoxathiol-2-one Derivatives from N-(4-Oxocyclohexa-2,5-dien-1-ylidene)ureas
作者:S. A. Konovalova、A. P. Avdeenko、V. V. Dʼyakonenko、S. V. Shishkina
DOI:10.1134/s1070428020040089
日期:2020.4
Abstract1,3-Benzoxathiol-2-one derivatives were synthesized by reactions of N-(4-oxocyclohexa-2,5-dien-1-ylidene)ureas with potassium thiocyanate or thiourea. In most cases, the highest yields were obtained in the reactions with thiourea in ethanol in the presence of hydrochloricacid, whereas the maximum yield from N-(2,6-dimethyl-4-oxocyclohexa-2,5-dien-1-ylidene)urea was achieved using potassium