Palladium(Ⅱ) p-Tolylamide and Reaction with CO2 to Generate a Carbamato Derivative

Pd(Ⅱ) p-tolylamide Pd(2,6-(Ph2PCH2)2C6H3)(NH(C6H4Me-p)) (1) was metathetically prepared by the reaction of Pd(2,6-(Ph2PCH2)2C6H3)Cl with NaNH(C6H4Me-p). Treatment of 1 with carbon dioxide affords the palladium(Ⅱ)carbamate Pd(2,6-(Ph2PCH2)2C6H3)(OC(O)NH(C6H4Me-p)) (2), uantitatively. Complex 2 reacts with HX (X = Cl,OTf) to give Pd(2,6-(Ph2PCH2)2C6H3)X, NH2(p-Tol) and CO2. Reaction of the palladium(II) carbamate with MeI produced Pd(2,6-(Ph2PCH2)2C6H3)I along with generation of methyl N-tolylcarbamate MeOC(O)NH(C6H4Me-p),exclusively.