1361456-15-6Relevant articles and documents
Palladacycles bearing tridentate CNS-type benzamidinate ligands as catalysts for cross-coupling reactions
Wang, Wei-Chi,Peng, Kuo-Fu,Chen, Ming-Tsz,Chen, Chi-Tien
experimental part, p. 3022 - 3029 (2012/04/10)
Three pendant benzamidines, [Ph-C(NC6H5)-{NH(E)}] [E = -(CH2)2SMe (1); -(CH2)2S tBu (2); -o-C6H4SMe (3)], are described. Reactions of 1, 2 or 3 with one molar equivalent of Pd(OAc)2 in CH2Cl2 give the palladacyclic complexes, [Ph-C{-NH(η1-C6H4)}{N(E)}]Pd(OAc) [E = -(CH2)2SMe (4); -(CH2)2S tBu (5); -o-C6H4SMe (6)], as mononuclear palladium complexes respectively. A minor product described as 5′, {[Ph-C{-N(C6H5)}{-N(CH2)2S tBu}]Pd(OAc)}2, was isolated as benzamidinate-bridged dinuclear palladium complex upon recrystallizing from Et2O/hexane solution. Treatment of 1, 2 or 3 with one molar equivalent of PdCl2 in the presence of NEt3 in CH2Cl2 gives the palladacyclic complexes, [Ph-C{-NH(η1-C6H 4)}{N(E)}]PdCl [E = -(CH2)2SMe (7); -(CH 2)2StBu (8); -o-C6H4SMe (9)], as mononuclear palladium complexes respectively. The crystal and molecular structures are reported for compounds 5, 5′ and 6-8. The application of these palladacyclic complexes to the Suzuki and Heck coupling reactions was examined.