Cross-dehydrogenative coupling via C(sp²)─H bond activation by PSP-pincer rhodium photocatalysis.

ABSTRACT: Cross-dehydrogenative coupling (CDC) between two C─H bonds without any oxidant would be an excellent C─C bond-forming reaction, generating H₂ as the only by-product. However, C(sp²)─H/C(sp²)─H CDC reactions remain rare despite the rapid development of transition metal catalysis, photocatalysis, and electrocatalysis. Here, we describe directing-group- and oxidant-free C(sp²)─H/C(sp²)─H CDC between arenes and styrenes/furans photocatalyzed by a PSP-pincer Rh complex to afford stilbenes/heterobiaryls under mild conditions (blue light irradiation, near room temperature). The reaction is applicable to a wide range of substrates, and undesired hydrogenation of the styrenes and stilbenes is strongly suppressed. The generated H₂ gas

SUBMITTER: Sakai K 

PROVIDER: S-EPMC12429016 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature