C2-Transformation of calcium carbide trigered by hydrogen sulfide

IF 8.9 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Chinese Chemical Letters Pub Date : 2025-04-17 DOI:10.1016/j.cclet.2025.111233

Yunzhe Du , Siliu Cheng , Shuyi Li , Junping Niu , Yuan Gou , Ligang Yan , Tian-Xing Zhang , Ruijun Xie , Limin Han , Tiezheng Jia , Ning Zhu

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Abstract

Calcium carbide, a bulky and cheap raw chemical, is traditionally depolymerized by water to release acetylene, allowing the downstream organic transformation. In this study, hydrogen sulfide (H₂S), an industrial waste gas, has been exploited to depolymerize calcium carbide, which represents a strategy for the comprehensive utilization of both hydrogen sulfide and calcium carbide. As a proof of concept, a three-component condensation reaction was established to prepare thioamides directly from hydrogen sulfide and calcium carbide in high yields. Leveraging the unique properties of thioamides that possess both nucleophilic sulfur and electrophilic carbon sites, a series of novel tandem reactions were further developed to construct structurally diverse heterocyclic compounds. Our strategy not only provides a new chemical pathway for calcium carbide depolymerization, but also offers a solution for the utilization of hazardous hydrogen sulfide gas. More importantly, this approach facilitates the comprehensive and sustainable utilization of the calcium carbide resource.

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由硫化氢引起的碳化钙的转变

电石是一种体积庞大、价格低廉的化学原料，传统上是用水解聚，释放乙炔，从而实现下游的有机转化。本研究利用工业废气硫化氢（H2S）解聚电石，实现了硫化氢和电石的综合利用。为了验证这一概念，建立了由硫化氢和电石直接制备高收率硫酰胺的三组分缩合反应。利用具有亲核硫和亲电碳位点的硫酰胺的独特性质，进一步开发了一系列新的串联反应，以构建结构多样的杂环化合物。我们的策略不仅为电石解聚提供了新的化学途径，也为危险硫化氢气体的利用提供了解决方案。更重要的是，该方法有利于电石资源的综合可持续利用。

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来源期刊

Chinese Chemical Letters 化学-化学综合

CiteScore

14.10

自引率

15.40%

发文量

8969

审稿时长

1.6 months

期刊介绍： Chinese Chemical Letters (CCL) (ISSN 1001-8417) was founded in July 1990. The journal publishes preliminary accounts in the whole field of chemistry, including inorganic chemistry, organic chemistry, analytical chemistry, physical chemistry, polymer chemistry, applied chemistry, etc.Chinese Chemical Letters does not accept articles previously published or scheduled to be published. To verify originality, your article may be checked by the originality detection service CrossCheck.