hydrogen–deuterium (H/D) exchange reactions of aminobenzoic acids catalysed by NaBD4‐activated Pd/C or RhCl3 with D2O as the deuteriumsource. We also investigated different NaBD4‐activated metal catalysts (including Pd/C, RhCl3 and Pt/C) under microwave conditions for an efficient H/Dexchange of aromatic and heterocyclic compounds. Even higher deuterium incorporations were obtained for Pd/C and Pt/C catalyst mixtures
Anti-Markovnikov additions to non-conjugated unsaturated amines in superacid are reported. In situ NMR studies, DFT calculations and labelled substrates reactions support the involvement of new ammoniumâcarbenium superelectrophiles in this original process.