We report a method for coupling of acetophenone oxime acetates, C−H bonds α to ketones, and elemental sulfur. The reactions proceeded in the presence of Li₂CO₃ (base) and DMSO (solvent) to afford 2‐benzoyl benzothienothiazoles. Functionalities including halogen, protected alcohol, and heterocycle groups were compatible with reaction conditions. Use of methylene C−H bonds in β‐keto esters is also viable. This marks a rare example for mild synthesis of S‐heterocycles from ketoxime acetates.

中文翻译：

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苯乙酮肟中C-H键环化的2-苯甲酰基噻吩并噻唑

我们报告了一种苯乙酮肟乙酸酯，CH键与酮和元素硫的CH键偶联方法。反应在Li ₂ CO ₃（碱）和DMSO（溶剂）存在下进行，得到2-苯甲酰基苯并噻吩并噻唑。包括卤素，受保护的醇和杂环基在内的功能与反应条件兼容。在β-酮酸酯中使用亚甲基CH键也是可行的。这标志着由醋酸酮肟轻度合成S杂环的罕见例子。