A three-component reaction of thiols, alkynes, and trialkylphosphites under visible-light irradiation has been investigated. This reaction affords α-substituted (E)-2-thiovinylphosphonates in yields up to 90% starting from simple, readily available reagents. High regio- and stereoselectivity was observed in most of the cases. The reaction features a rare example of one-step formation of C(sp2)–S and C(sp2)–P bonds.
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Kharlamova et al. (2026) studied this question.
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