B. El Ali et al., Regioselective control of the thiocarbonylation of terminal acetylenes with arylthiols catalyzed by Pd(II) and diphosphine ligands, TETRAHEDR L, 42(8), 2001, pp. 1567-1570
Control of the regioselective thiocarbonylation of terminal acetylenes 1a-e
with arylthiols 2a,b was successfully achieved by using Pd(OAc)(2) and 1,4
-bis(diphenylphosphino)butane (dppb), or 1,3-bis(diphenylphosphino)propane
(dppp), as catalysts. The formation of the thioesters 3 or 4 depends mainly
on the type of ligand (dppp or dppb) and the solvent (THF or CH2Cl2) under
CO/H+ or syngas mixture. (C) 2001 Elsevier Science Ltd. All rights reserve
d.