0000000000821735
AUTHOR
Tatyana M. Buslaeva
Palladium-ADC complexes as efficient catalysts in copper-free and room temperature Sonogashira coupling
Abstract The metal-mediated coupling between cis-[PdCl2(CNR1)2] [R1 = cyclohexyl (Cy) 1, t-Bu 2, 2,6-Me2C6H3 (Xyl) 3, 2-Cl-6-MeC6H3 4] and hydrazones H2NN CR2R3 [R2, R3 = Ph 5; R2, R3 = C6H4(OMe-4) 6; R2/R3 = 9-fluorenyl 7; R2 = H, R3 = C6H4(OH-2) 8] provided carbene complexes cis-[PdCl2{C(N(H)N CR2R3) N(H)R1}(CNR1)] (9–24) in good (80–85%) yields. Complexes 9–24 showed high activity [yields up to 99%, and turnover numbers (TONs) up to 3.7 × 104] in the Sonogashira coupling of various aryl iodides with a range of substituted aromatic alkynes without the need of copper co-catalyst. The catalytic procedure runs at 80 °C for 1 h in EtOH using K2CO3 as a base. No formation of homocoupling or ac…
Application of palladium complexes bearing acyclic amino(hydrazido)carbene ligands as catalysts for copper-free Sonogashira cross-coupling
Abstract Metal-mediated coupling of one isocyanide in cis-[PdCl2(CNR1)2] (R1 = C6H11 (Cy) 1, tBu 2, 2,6-Me2C6H3 (Xyl) 3, 2-Cl-6-MeC6H3 4) and various carbohydrazides R2CONHNH2 [R2 = Ph 5, 4-ClC6H4 6, 3-NO2C6H4 7, 4-NO2C6H4 8, 4-CH3C6H4 9, 3,4-(MeO)2C6H3 10, naphth-1-yl 11, fur-2-yl 12, 4-NO2C6H4CH2 13, Cy 14, 1-(4-fluorophenyl)-5-oxopyrrolidine-3-yl 15, (pyrrolidin-1-yl)C(O) 16, 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propane-1-yl 17, EtNHC(O) 18] or sulfohydrazides R3SO2NHNH2 [R3 = Ph 19, 4-MeC6H4 20] led to a series of (hydrazido)(amino)carbene complexes cis-[PdCl2{ C (NHNHX) N(H)R1}(CNR1)]; X = COR2, SO2R3 (21–48, isolated yields 60–96%). All prepared species were characterized by elemental…
CCDC 1501943: Experimental Crystal Structure Determination
Related Article: Elena A. Valishina, M. Fátima C. Guedes da Silva, Mikhail A. Kinzhalov, Svetlana A. Timofeeva, Tatyana M. Buslaeva, Matti Haukka, Armando J.L. Pombeiro , Vadim P. Boyarskiy, Vadim Yu. Kukushkin, Konstantin V. Luzyanin|2014|J.Mol.Catal.A:Chem.|395|162|doi:10.1016/j.molcata.2014.08.018
CCDC 1501944: Experimental Crystal Structure Determination
Related Article: Elena A. Valishina, M. Fátima C. Guedes da Silva, Mikhail A. Kinzhalov, Svetlana A. Timofeeva, Tatyana M. Buslaeva, Matti Haukka, Armando J.L. Pombeiro , Vadim P. Boyarskiy, Vadim Yu. Kukushkin, Konstantin V. Luzyanin|2014|J.Mol.Catal.A:Chem.|395|162|doi:10.1016/j.molcata.2014.08.018
CCDC 1501945: Experimental Crystal Structure Determination
Related Article: Elena A. Valishina, M. Fátima C. Guedes da Silva, Mikhail A. Kinzhalov, Svetlana A. Timofeeva, Tatyana M. Buslaeva, Matti Haukka, Armando J.L. Pombeiro , Vadim P. Boyarskiy, Vadim Yu. Kukushkin, Konstantin V. Luzyanin|2014|J.Mol.Catal.A:Chem.|395|162|doi:10.1016/j.molcata.2014.08.018