Cyclic dithiocarbonates (1,3-oxathiolane-2-thione) were efficiently synthesized from epoxides and CS₂ using disodium bis-benzimidazolate salts as catalysts. Three different catalysts (BBE−Me, BBE−H, BBE-NO₂) were designed and synthesized, with BBE−Me showing 95 % conversion and 99 % selectivity. The catalyst enabled selective, solvent-free reactions under mild conditions. Mechanistic insights revealed simultaneous activation of CS₂ and epoxides, acting as a multifunctional organocatalyst.

中文翻译：

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使用双苯并咪唑酸盐作为多功能催化剂选择性合成环状二硫代碳酸酯


以双苯并咪唑酸盐二钠为催化剂，由环氧化物和 CS₂ 高效合成环状二硫代碳酸酯 （1,3-氧唑烷-2-硫酮）。设计并合成了三种不同的催化剂（BBE-Me、BBE-H、_{BBE-NO 2}），其中 BBE-Me 显示出 95% 的转化率和 99% 的选择性。该催化剂可在温和条件下进行选择性、无溶剂反应。机理见解揭示了 CS₂ 和环氧化物的同时活化，充当多功能有机催化剂。