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 hydrochloric acid, whereas the maximum yield from N-(2,6-dimethyl-4-oxocyclohexa-2,5-dien-1-ylidene)urea was achieved using potassium
摘要通过N-(4-氧代环己-2,5-二烯-1-基)脲与硫氰酸钾或硫脲的反应合成了1,3-苯并恶硫醇-2-酮衍生物。在大多数情况下,在盐酸存在下,与硫脲在乙醇中的反应中获得最高收率,而N-(2,6-二甲基-4-氧代环己-2,5-二烯基-1。尿素是使用硫氰酸钾获得的。N-(3,5-二甲基-4-氧代环己-2,5-二烯-1-基)脲与硫氰酸钾反应生成6-(氨基甲酰基氨基)-3-羟基-2,4-二甲基苯硫氰酸酯,并与硫脲以产生5-羟基-4,6-二甲基-2- ħ -1,3-苯并恶硫醇-2-酮。决定氮反应方向的主要因素具有硫氰酸钾的-(4-氧代环己-2,5-二烯-1-基)脲是主要过渡态的能量。