Sharma D, Chatterjee R, Dhayalan V, Dandela R. Metal-free oxidative coupling of aryl acetylene with elemental sulphur and amines: facile access to α-ketothioamides.
Org Biomol Chem 2024;
22:5913-5917. [PMID:
38993016 DOI:
10.1039/d4ob00830h]
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Abstract
A simple and efficient oxidative coupling of aromatic alkynes with elemental sulphur and secondary amines has been reported. The iodine/DMSO system easily promoted the transformations, affording thioglyoxamides via C-S, C-O, and C-N bond formations. In this context, acetylenic C-H bond oxidation has occurred through iodination, leading to the desired products. Moreover, this metal-free, one-pot protocol is accomplished by using readily available starting materials, without external oxidants, and under aerobic conditions, providing a variety of α-ketothioamide compounds in moderate to good yields.
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