Reaction of Sulfur Dichloride with Nitrile in the Presence of Lewis Acid Forming 1,2,4-Thiadiazole
作者:Mitsuo Komatsu、Jun-ichi Shibata、Yoshiki Ohshiro、Toshio Agawa
DOI:10.1246/bcsj.56.180
日期:1983.1
Formation of 3,5-disubstituted 1,2,4-thiadiazoles by the reaction of sulfur dichloride with nitriles in the presence of a Lewis acid was found. For example, 3,5-diphenyl-1,2,4-thiadiazole was obtained with its chlorinated products, 3-o-chlorophenyl-5-phenyl- and 3-p-chlorophenyl-5-phenyl-1,2,4-thiadiazoles, from benzonitrile and sulfur dichloride using aluminium chloride as a catalyst (total yield
发现通过二氯化硫与腈在路易斯酸存在下的反应形成了 3,5-二取代的 1,2,4-噻二唑。例如,3,5-二苯基-1,2,4-噻二唑与其氯化产物3-o-氯苯基-5-苯基-和3-对-氯苯基-5-苯基-1,2,4-以氯化铝为催化剂,由苄腈和二氯化硫制备噻二唑(总产率 80%)。通过使用氯化铁 (III) 作为催化剂或使用氯化硫代替二氯化物来抑制芳环的氯化程度。一些取代的苯甲腈和新戊腈也以较低的产率得到噻二唑。