Allenyl thianthrenium (ATT) hexafluorophosphate is a bench-stable, non-hygroscopic electrophilic reagent used in cross-coupling reactions1. It is capable of the formation of C(sp2)-C(sp2) and C(sp3)-C(sp2) bonds via Suzuki and reductive coupling reactions. ATT+-PF6- provides a straightforward and efficient approach to introducing allenyl functionality into aromatic and aliphatic systems. It avoids isomerization typical of propargylating reagents, ensuring cleaner reaction profiles. Applications span from the synthesis of biologically relevant compounds to advanced material precursors. The reagent shows no decomposition up to 127°C and can be stored for over a year under ambient conditions, making it robust and reliable.

Synonyms: 5-(propa-1,2-dien-1-yl)-5H-thianthren-5-ium hexafluorophosphate(V); ATT+PF6-