Nickel-Catalyzed Amination of Aryl Phosphates through Cleaving Aryl C–O Bonds
作者:Jin-Hua Huang、Lian-Ming Yang
DOI:10.1021/ol201437g
日期:2011.7.15
amination of triaryl phosphates was achieved using a Ni(II)–(σ-Aryl) complex/NHC catalyst system in dioxane at 110 °C in the presence of NaH as base. Electron-neutral, -rich, and -deficient triaryl phosphates were coupled with a wider range of amine partners including cyclic and acyclic secondary amines, aliphatic primary amines, and anilines in good to excellent yields.
Aerobic Oxidation of Phosphite Esters to Phosphate Esters by Using an Ionic-Liquid-Supported Organotelluride Reusable Catalyst
作者:Shinichi Koguchi、Aya Mihoya、Yuga Shibuya、Akane Ito、Anna Toyoda、Makoto Oba
DOI:10.1055/s-0040-1706068
日期:2020.12
the synthesis of an ionic-liquid (IL)-supported organotelluride catalyst and its application as a recyclable catalyst for the aerobic oxidation of phosphite esters to phosphate esters. This method shows high conversion rates, allows the ready isolation and purification of the resulting products, and exhibits good reusability of the catalyst.
A step-economical and operationally simple nickel-catalyzed cross-electrophile coupling of aryl phosphates with arylbromides through C−O bond cleavage, which precluded the employment of relatively moisture-labile and unreadily available organometallics, was developed. The reaction proceeded smoothly in the presence of magnesium turnings and lithium chloride in THF to afford the corresponding biaryls
Diorganotellurides containing bulky aromatic substituents are found to catalyze the photooxidation of phosphite esters using aerobic oxygen as a terminal oxidant. A Hammett plot with substituted triaryl phosphites yielding rho = 2.88 agrees with a nucleophilic oxygen transfer from telluroxide to phosphite.