Regioselective Copper(II)-Mediated Bromoamination of Unfunctionalized Olefins: An Efficient Route to N-Heterocyclic Compounds
作者:Gong-Qing Liu、Zhen-Ying Ding、Li Zhang、Ting-Ting Li、Lin Li、Lili Duan、Yue-Ming Li
DOI:10.1002/adsc.201301125
日期:2014.7.7
Bromoamination of unfunctionalized olefins was realized under mild conditions using copper(II) bromide (CuBr2) as both reaction promoter and bromine source. The reactions could be carried out under open air at ambient temperature, and both N‐alkylated and N‐tosylated substrates could be converted to the corresponding N‐heterocyclic compounds in high regioselectivity and good isolated yields. A variety
Preparation of cationic cobalt phenoxide and ethoxide complexes and their reversible reaction with carbon dioxide
作者:Stephen J. Archibald、Simon P. Foxon、Jonathan D. Freeman、James E. Hobson、Robin N. Perutz、Paul H. Walton
DOI:10.1039/b204560e
日期:2002.7.10
The complexes [Co(TCT)(OR)]BPh4 (R = Et, Ph; TCT =
cis,cis-1,3,5-tris(cinnamylideneamino)cyclohexane) have been prepared and characterised by X-ray diffraction; in coordinating solvents both complexes react reversibly with carbon dioxide to form organocarbonate complexes.
我们制备了[Co(TCT)(OR)]BPh4(R = Et,Ph;TCT = cis,cis-1,3,5-tris(cinnamylideneamino)cyclohexane)复合物,并通过 X 射线衍射对其进行了表征;在配位溶剂中,这两种复合物都能与二氧化碳发生可逆反应,形成有机碳酸盐复合物。
Hydrogen−Deuterium Exchange between TpRu(PMe<sub>3</sub>)(L)X (L = PMe<sub>3</sub> and X = OH, OPh, Me, Ph, or NHPh; L = NCMe and X = Ph) and Deuterated Arene Solvents: Evidence for Metal-Mediated Processes
作者:Yuee Feng、Marty Lail、Nicholas A. Foley、T. Brent Gunnoe、Khaldoon A. Barakat、Thomas R. Cundari、Jeffrey L. Petersen
DOI:10.1021/ja0615775
日期:2006.6.1
or 5-positions or PMe3 ligands. For TpRu(PMe3)(NCMe)Ph, the H/D exchange occurs at 60 degrees C at all three Tp positions and the phenyl ring. TpRu(PMe3)2Cl, TpRu(PMe3)2OTf (OTf = trifluoromethanesulfonate), and TpRu(PMe3)2SH do not initiate H/D exchange in C6D6 after extended periods of time at elevated temperatures. Mechanistic studies indicate that the likely pathway for the H/D exchange involves
Foundry moulds and cores are prepared by using as a binder a phenolic resin in solution in aqueous sodium hydroxide and using an ester to cure the binder. The ester may be incorporated in the mixture prior to shaping, or the ester in gaseous form may be passed through the shaped mixture.
A foundry core is prepared by mixing a foundry aggregate and an alkaline aqueous solution of a phenolate resin and an ester. The mixture is formed to the required shape and the vapour of the organic ester is passed through the mixture.