Tetrabutylammonium decatungstate (TBADT), a compelling and trailblazing catalyst for visible-light-induced organic photocatalysis

Abstract

Tetrabutylammonium decatungstate (TBADT) has recently emerged as an intriguing photocatalyst under visible-light or near-visible-light irradiation in a wide range of organic reactions that were previously not conceivable. Given its ability...

Visible-Light-Photocatalyzed Self-Cyclopropanation Reactions of Dibenzoylmethanes for the Synthesis of Cyclopropanes

“…Many cases resulted in no reaction and the recovery of 1a (for details, see Table S1). When utilizing 4-CzIPN ( VI ) and Ir­(ppy) 2 (dtbbpy)­PF 6 ( IX ), moderate yields of 3a were obtained, whereas with TBADT ( VIII ), only a tiny amount of 3a was observed; a substantial amount of 1a was recovered, and some complex mixtures were observed (Table , entries 5–7). Among these photocatalysts, Ir­(dF­(CF 3 )­ppy) 2 (dtbpy)­PF 6 ( X ) and 2-chloro-9 H -thioxanthen-9-one ( II ), abbreviated as 2-ClTX , emerged as particularly promising candidates, giving the highest yields of 3a following a 24 h irradiation [65% and 61% isolated yields, respectively (Table , entries 8 and 9, respectively)].…”