Utilization of carbon disulfide (CS₂), a low-cost and sulfur-rich one-carbon (C1) feedstock, for making sulfur-containing polymers is important for both polymer chemistry and applied environmental science. However, the production of well-defined sulfur-containing polymers from CS₂ and epoxides remains a key challenge. Here, we report a robust coupling reaction of CS₂ and epoxides for chemoselectively producing poly(thioether)s and carbonyl sulfide (COS) in one pot. The resultant polymer has exclusive thioether units and a thiol (−SH) terminal. This route takes advantage of oxygen/sulfur exchanges through two consecutive reactions, i.e., cycloaddition of CS₂ to epoxides and dethiocarboxylative ring-opening polymerization of the generated cyclic dithiocarbonates. The process can be conducted in ambient air with several commercially available organic bases as catalysts (initiators) and extended to a variety of epoxides, yielding COS and diverse poly(thioether)s with tens of grams. This work furnishes an original and practical strategy for utilizing CS₂ as a sulfur feedstock in polymer synthesis.

中文翻译：

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CS ₂和环氧化合物通过氧/硫原子交换产生聚硫醚和COS的化学选择性偶联

利用二硫化碳（CS ₂）这种低成本且富含硫的一碳（C1）原料制造含硫聚合物对于聚合物化学和应用环境科学都非常重要。然而，由CS ₂和环氧化物生产定义明确的含硫聚合物仍然是关键挑战。在这里，我们报告CS ₂和环氧化物的鲁棒性偶联反应，用于在一锅中化学选择性地产生聚硫醚和羰基硫（COS）。所得的聚合物具有排他的硫醚单元和硫醇（-SH）末端。该路线通过两个连续的反应（即CS _2的环加成）利用了氧/硫的交换生成的环状二硫代碳酸酯的环氧化物和脱硫羧化的开环聚合反应。该方法可以在环境空气中以几种可商购的有机碱作为催化剂（引发剂）进行，并扩展到各种环氧化物中，从而生成COS和数十克的多种聚（硫醚）。这项工作为将CS ₂用作聚合物合成中的硫原料提供了一种原始而实用的策略。