Transition metal-free stereospecific di-chalcogenations of substituted acetylenes

Abstract

We report a one-pot, transition metal-free, stereospecific di-chalcogenation reaction for the synthesis of a diverse range of substituted Z-di-organochalcogenides. This method employs Cs2CO3 as a non-toxic basic catalyst in dimethyl sulfoxide under mild conditions at 60 °C. The reaction proceeds with high stereospecificity, offering excellent functional group tolerance and high to excellent yields. The broad substrate scope, scalability to gram-level synthesis, and operational simplicity make the method highly practical and efficient. Intermediate 6aa′ enabled the efficient synthesis of unsymmetrical (Z)-phenyl/aryl(1-phenyl-2-(phenylselanyl)vinyl)sulfane via coupling with diaryl diselenides in high yields. Additionally, the process features a clean reaction profile and is environmentally friendly, highlighting its potential for both academic and industrial applications. This approach provides a cost-effective and sustainable solution for Z-di-organochalcogenides synthesis.

Graphical abstract: Transition metal-free stereospecific di-chalcogenations of substituted acetylenes

Supplementary files

Article information

Article type
Paper
Submitted
09 Jul 2025
Accepted
16 Sep 2025
First published
17 Sep 2025

Org. Biomol. Chem., 2025, Advance Article

Transition metal-free stereospecific di-chalcogenations of substituted acetylenes

Y. Chang, I. Karmakar, R. Bai and C. Lee, Org. Biomol. Chem., 2025, Advance Article , DOI: 10.1039/D5OB01108F

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