Expanding the forefront of strong organic Brønsted acids: proton-catalyzed hydroamination of unactivated alkenes and activation of Au(I) for alkyne hydroamination.

The synthesis of a solid, bench-stable, strong organic Brønsted acid with a computed pKa of 0.9 is reported. An X-ray crystal structure and DFT calculations are provided which offer insight into the bonding of this acid. The application of this strong organic Brønsted acid as a catalyst for the intermolecular hydroamination of unactivated alkenes and as an activator for Au(I)-catalyzed alkyne hydroamination with anilines is described.