Various aromatic and heterocyclic oxazolines were directly converted to respective cyanomethyl esters with pyridinium hydrobromide perbromide in water at room temperature.
Ligand‐Controlled Regiodivergence in Nickel‐Catalyzed Hydroarylation and Hydroalkenylation of Alkenyl Carboxylic Acids**
作者:Zi‐Qi Li、Yue Fu、Ruohan Deng、Van T. Tran、Yang Gao、Peng Liu、Keary M. Engle
DOI:10.1002/anie.202010840
日期:2020.12.14
the ligand environment around the metal center dictates the regiochemical outcome. Markovnikov hydrofunctionalization products are obtained under mild ligand‐free conditions, with up to 99 % yield and >20:1 selectivity. Alternatively, anti‐Markovnikov products can be accessed with a novel 4,4‐disubstituted Pyrox ligand in excellent yield and >20:1 selectivity. Both electronic and stericeffects on the
Palladium-Catalyzed Allylic Cross-Coupling Reactions of Primary and Secondary Homoallylic Electrophiles
作者:Benjamin J. Stokes、Susanne M. Opra、Matthew S. Sigman
DOI:10.1021/ja305403s
日期:2012.7.18
cross-coupling of homoallylic tosylate substrates using boronic acids and pinacol esters is reported. The reaction uses 2-(4,5-dihydro-2-oxazolyl)quinoline (quinox) as a ligand and is performed at ambient temperature. The scope of the reaction is broad in terms of both the boronate transmetalating reagent and the substrate and includes secondary tosylates. Mechanistic studies support an alkene-mediated
S–Co(II) cascade catalysis: cyclocondensation of aromatic nitriles with alkamine
作者:Haixia Ge、Ping Liu、Xiangnan Li、Wei Sun、Jianli Li、Bingqin Yang、Zhen Shi
DOI:10.1016/j.tet.2013.05.132
日期:2013.8
A solvent-free S/Co(NO3)2 cascade catalyzed cyclocondensation reaction of aromaticnitriles with 3-amino-1-propanol or 2-aminoethanol has been successfully developed under thermal and microwave conditions. By this two-component protocol, mono- and bis-oxazines and oxazolines were selectively synthesized both in good to excellent yields and short reaction times. This catalytic system exhibits excellent
2-(3,5-Disubstituted-4-pyridyl)-4-(thienyl, thiazolyl or arylphenyl)-1,3-oxazoline compounds
申请人:——
公开号:US20040006108A1
公开(公告)日:2004-01-08
Oxazoline compounds having a 3,5-disubstituted-4-pyridyl group in the 2-position and a thienyl, thiazolyl or an arylphenyl group in the 4-position are effective in controlling aphids, insects and mites.
A highly active iron (II) complex that catalyzed epoxidation of terminal olefins with hydrogen peroxide was described. The catalytic system displayed excellent catalytic ability for the selective oxidation of terminal olefins to epoxides with high selectivity (up to 97.8%) in CH3CN at 25 °C. The catalytic activity of three similarly structural iron (II) complexes was comparatively studied. The effect