AlCl3-promoted thiolation of acyl C–H bonds with arylsulfonyl hydrazides
摘要:
AlCl3-promoted thiolation of acyl C-H bonds with arylsulfonyl hydrazides was developed, which represents an effective synthesis of S-aryl thiocarbamates via C-S bond formation reaction. (C) 2015 Elsevier Ltd. All rights reserved.
the synthesis of thiocarbamates has been developed. When dialkyl or diaryl disulfides were allowed to react with secondary amines and carbonmonoxide in the presence of a catalytic amount of a palladium complex, the thiocarbamates were obtained in moderate to good yields. In contrast to that of secondary amines, in the reaction of a primary amine, no formation of thiocarbamate was confirmed, but urea
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.
AlCl3-promoted thiolation of acyl C–H bonds with arylsulfonyl hydrazides
AlCl3-promoted thiolation of acyl C-H bonds with arylsulfonyl hydrazides was developed, which represents an effective synthesis of S-aryl thiocarbamates via C-S bond formation reaction. (C) 2015 Elsevier Ltd. All rights reserved.