1,3-Diarylimidazolidin-2-ylidene (NHC) complexes of Pd(II): Electronic effects on cross-coupling reactions and thermal decompositions
作者:Hayati Türkmen、Bekir Çetinkaya
DOI:10.1016/j.jorganchem.2006.05.020
日期:2006.9
1,3-diarylimidazolidin-2-ylidene (NHC) precursor, 1,3-bis(2,4,6-trimethylphenyl)imidazolinium chloride, (3b) has been extended to the electronically and sterically modified NHC precursors 3a (X = H), 3c (X = Br) and 3e (X = Cl) in order to investigate the electronic effect of a p-substituent (X) on cross-coupling catalysts. Complexes of the type PdCl2(NHC)2 (5), PdCl2(NHC)(PPh3) (6) and [RhCl(NHC)(cod)]
[EN] METHODS OF PRODUCING ALPHA, BETA-UNSATURATED CARBOXYLIC ACID SALTS FROM ALKANES AND CARBON DIOXIDE<br/>[FR] PROCÉDÉS DE PRODUCTION DE SELS D'ACIDE CARBOXYLIQUE ALPHA, BÊTA-INSATURÉS À PARTIR D'ALCANES ET DE DIOXYDE DE CARBONE
申请人:SABIC GLOBAL TECHNOLOGIES BV
公开号:WO2019053540A1
公开(公告)日:2019-03-21
Methods of producing α,β-unsaturated carboxylic acid salt are described. A method can include reacting an alkene and carbon dioxide with a composition that includes a carboxylation catalyst, an organic base that is solubilized in the composition, and an inorganic base that is not solubilized in the composition, under reaction conditions suitable to produce an inorganic base salt of an α,β-unsaturated carboxylic acid. The organic base can have a first pKa and the inorganic base has a second pKa that is greater than the first pKa.
Selective [1,4]-Hydrovinylation of 1,3-Dienes with Unactivated Olefins Enabled by Iron Diimine Catalysts
作者:Valerie A. Schmidt、C. Rose Kennedy、Máté J. Bezdek、Paul J. Chirik
DOI:10.1021/jacs.8b00245
日期:2018.3.7
into the origin of the high selectivity. An iron diene complex was identified as the catalyst resting state, and one such isoprene complex, (iPrDI)Fe(η4-C5H8), was isolated and characterized. A combination of single crystal X-ray diffraction, Mößbauer spectroscopy, magnetic measurements, and DFT calculations established that the complex is best described as a high-spin Fe(I) center ( SFe = 3/2) engaged
Azolines are oxidized in the presence of a copper-containing catalyst to azoles in the presence of molecular oxygen. A synthetic scheme converting azolines azoles is also provided.
在含有铜催化剂的情况下,吡唑烯被氧化为吡唑,同时存在分子氧。还提供了将吡唑烯转化为吡唑的合成方案。
[EN] METHODS OF MAKING ALPHA, BETA-UNSATURATED CARBOXYLIC ACIDS OR SALTS<br/>[FR] PROCÉDÉS DE FABRICATION D'ACIDES CARBOXYLIQUES ALPHA,BÊTA-INSATURÉS OU DE LEURS SELS
申请人:SABIC GLOBAL TECHNOLOGIES BV
公开号:WO2017158469A1
公开(公告)日:2017-09-21
Methods of making an α,β-unsaturated carboxylic acid or a salt thereof is disclosed. The method can include reacting an alkene and carbon dioxide with a composition comprising a metal containing carboxylation catalyst and a coordinating ligand under conditions suitable to produce the α,β-unsaturated carboxylic acid or salt thereof. The coordinating ligand can include at least two coordinating atoms selected from nitrogen (N), oxygen (O), sulfur (S), and carbene that coordinate with the metal in the carboxylation catalyst.