A series of quinoxaline-2-thiols and quinoxalines were prepared in moderate to good yields from various phenacyl sulfoxides bearing 1-methyl-1H-tetrazole and o-arylenediamines. The proposed reaction mechanism involves generation of sulfines from the phenacyl sulfoxides bearing 1-methyl-1H-tetrazole through thermolysis elimination. Then, site-selective carbophilic addition of sulfines by o-arylenediamines
从各种带有 1-甲基-1 H-
四唑和邻亚芳基二胺的苯甲酰亚砜中制备出一系列的 quinoxaline-2-thiol 和 quinoxalines,产率适中到高。所提出的反应机理涉及通过热解消除从带有 1-甲基-1 H-
四唑的苯甲酰基亚砜中生成亚
磺酸。然后,邻亚芳基二胺对亚
磺酸进行位点选择性亲碳加成,然后进行消除、分子内亲核加成和脱
水缩合。目前的方法为制备
喹喔啉-2-
硫醇和
喹喔啉提供了一种直接而简单的策略。