A novel palladium-catalyzed azathiolation of carbon monoxide using sulfenamide (RSNR'(2)) (1) is described to provide thiocarbamate 2 in good yields. The mechanistic proposal includes the following: (1) insertion of CO into Pd-S bond of Pd(SR)(2)(PPh3)(n) 4 to provide Pd[C(O)SR](SR)-(PPh3)(n) 5 and (2) sigma-bond metathesis between S-N and Pd-C(O) bonds to afford 2 with the regeneration of 4.