Synthesis and Isolation of an Acyclic Tridentate Bis(pyridine)carbodicarbene and Studies on Its Structural Implications and Reactivities
作者:Yu-Chen Hsu、Jiun-Shian Shen、Bo-Chao Lin、Wen-Ching Chen、Yi-Tsu Chan、Wei-Min Ching、Glenn P. A. Yap、Chao-Ping Hsu、Tiow-Gan Ong
DOI:10.1002/anie.201406481
日期:2015.2.16
The simple synthetic development of acyclic pincer bis(pyridine)carbodicarbene is depicted herein. Presented is the first isolated structural pincer carbodicarbene with a C‐C‐C angle of 143°, larger than the monodentate framework. More importantly, theoretical analysis showed that this carbodicarbene embodies a more allene‐like character. Palladium complexes supported by this pincer ligand are active
Invisible Chelating Effect Exhibited between Carbodicarbene and Phosphine through π–π Interaction and Implication in the Cross-Coupling Reaction
作者:Wei-Chih Shih、Yun-Ting Chiang、Qing Wang、Ming-Chun Wu、Glenn P. A. Yap、Lili Zhao、Tiow-Gan Ong
DOI:10.1021/acs.organomet.7b00692
日期:2017.11.13
Palladium complexes supported with the mixed ligands carbodicarbene (CDC) and different phosphine ligands (PPh3, PTol3, and PCy3) were prepared, and their molecular structures were characterized. Examination of the structures of 2-PPh3 and 2-PTol3 with cis configuration discloses the existence of an unexpected π–π interaction between one phenyl group of the phosphine and the benzimidazole ring of a
Canopied trans-chelating bis(N-heterocyclic carbene) ligand: synthesis, structure and catalysis
作者:Brad P. Morgan、Gabriela A. Galdamez、Robert J. Gilliard, Jr.、Rhett C. Smith
DOI:10.1039/b815739a
日期:——
pseudo-square planar [PdCl(2)()] showed a similar binding mode of (C-Pd-C = 177 degrees ). High yields were obtained in Suzuki-Miyaura coupling reactions utilizing [PdCl(2)()] as the procatalyst and the results were compared with analogous complexes of trans-spanning diphosphine () and diphosphinite () complexes. The diphosphinite complex, [PdCl(2)()], decomposes to [mu-ClPd(PPh(2)OH)(PPh(2)O)](2) at room
Rapid threefold cross-couplings with sterically bulky triarylbismuths under Pd–Cu dual catalysis
作者:Maddali L. N. Rao、Ritesh J. Dhanorkar
DOI:10.1039/c5ra23311a
日期:——
The threefold cross-coupling reactivity of sterically highly demanding bulky triarylbismuths was addressed with task specific Pd–Cu dual catalytic conditions. In this study, an unprecedented hitherto unknown cross-coupling reactivity of sterically bulky triarylbismuths was demonstrated with a diverse range of aryl iodides and bromides. The intermediacy and in situ formation of arylcopper was probed
The 1,3-Diaminobenzene-Derived Aminophosphine Palladium Pincer Complex {C6H3[NHP(piperidinyl)2]2Pd(Cl)} - A Highly Active Suzuki-Miyaura Catalyst with Excellent Functional Group Tolerance
作者:Jeanne L. Bolliger、Christian M. Frech
DOI:10.1002/adsc.200900848
日期:——
The rapidly prepared 1,3‐diaminobenzene‐derived aminophosphine pincer complex C6H3[NHP(piperidinyl)2]2Pd(Cl)} (1) is an effective Suzuki catalyst with excellentfunctionalgrouptolerance. Side‐product formations, such as homocoupling, debromation or protodeboration have only rarely been detected and if so, were in all cases below the 5% level. The presented reaction protocol is universally applicable
快速制备的1,3-二氨基苯衍生的氨基膦钳形配合物C 6 H 3 [NHP(哌啶基)2 ] 2 Pd(Cl)}(1)是一种有效的Suzuki催化剂,具有出色的官能团耐受性。仅很少检测到副产物形成,例如均偶联,去溴化或原去硼,如果这样,在所有情况下均低于5%的水平。提出的反应方案是普遍适用的。实验观察表明,钯纳米颗粒的催化活性形式1。