A Novel Preparation of Polarized Ethylenes by the Reaction of Thioamides or Dithiocarboxylates with Tetracyanoethylene Oxide. Synthesis of Pyrazoles and Pyrimides
Rhodium-Catalyzed Acyl-Transfer Reaction between Benzyl Ketones and Thioesters: Synthesis of Unsymmetric Ketones by Ketone CO–C Bond Cleavage and Intermolecular Rearrangement
In the presence of catalytic amounts of RhH(CO)(PPh3)3 and 1,2-bis(diphenylphosphino)benzene (dppBz), acyl groups were transferred between benzyl ketones and thioesters/aryl esters. The rhodium complex catalyzed the cleavage of ketone CO–C bonds and intermolecular rearrangement giving unsymmetric ketones. The acyl-transfer reaction also occurred with 1-(p-chlorophenyl)-3-(p-cyanophenyl)propane-2-one
A Novel Preparation of Polarized Ethylenes by the Reaction of Thioamides or Dithiocarboxylates with Tetracyanoethylene Oxide. Synthesis of Pyrazoles and Pyrimides
source, a KF-catalyzed strategy was employed for the direct thiomethylation of carboxylic acids with DMSO for the preparation of methyl thioesters. In this process, a wide range of methyl thioesters were obtained in moderate to excellent yields. This novel strategy features the first use of DMSO as a methylthiolating agent for the construction of methyl thioesters, transition metal-free conditions, inexpensive