C–S bond formation catalyzed by N-heterocylic carbene palladium phosphine complexes
CF Fu, YH Liu, SM Peng, ST Liu
Index: Fu, Ching-Feng; Liu, Yi-Hung; Peng, Shei-Ming; Liu, Shiuh-Tzung Tetrahedron, 2010 , vol. 66, # 12 p. 2119 - 2122
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Citation Number: 26
Abstract
N-Heterocyclic carbenes (NHCs) are known to be useful ligands for palladium-complex catalysis. It was found that [(NHC) Pd (PPh3) Cl2] is an effective pre-catalyst in Pd-catalyzed C–S cross coupling reactions to produce the functionalized sulfides in excellent yields. The turn over frequency (TOF) for the coupling of p-CH3C6H4Br with p-CH3C6H4SH reaches to 6.25 (mol of product)(mole of catalyst)− 1h− 1.
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