Direct Conversion of Phosphonates to Phosphine Oxides: An Improved Synthetic Route to Phosphines Including the First Synthesis of Methyl JohnPhos
作者:Alexander J. Kendall、Chase A. Salazar、Patrick F. Martino、David R. Tyler
DOI:10.1021/om500854u
日期:2014.11.10
reaction intermediate. A diverse array of phosphonates was converted to phosphine oxides using a variety of Grignard reagents for direct carbon–phosphorus functionalization. This new methodology especially simplifies the synthesis of dimethylphosphino (RPMe2)-type phosphines by using air-, water-, and silica-stable intermediates. To highlight this reaction, a new Buchwald-type ligand ([1,1′-biphenyl]-
Ir(III)-Catalyzed Direct C–H Functionalization of Arylphosphine Oxides: A Strategy for MOP-Type Ligands Synthesis
作者:Zhong Liu、Ji-Qiang Wu、Shang-Dong Yang
DOI:10.1021/acs.orglett.7b02710
日期:2017.10.6
efficiently applied to Ir(III)-catalyzed direct C–H functionalization of arylphosphine oxides. Involving C–H activation, carbene insertion, and tautomerism, this reaction proceeds under mild conditions, thus proving an approach to the synthesis of MOP-type ligand precursor in a single step. The utility of this transformation has been further demonstrated in ligand synthesis as well as in the construction
A catalyst composed of an organic phosphorus compound having a trivalent or pentavalent phosphorus atom and at least one carbon-phosphorus bonding or a combination of the organic phosphorus compound and a halogen atom-containing compound is effective for decarbonylation, that is, for releasing carbon monoxide from a compound containing a moiety of -CO-CO-O- in its molecular structure.
Provided is a production process of a cyanoethyl ether by reacting an alcohol and acrylonitrile in a two-phase system of a non-ether solvent/an aqueous alkali solution.
通过在非醚溶剂/水性碱溶液的两相体系中将醇和丙烯腈反应,提供了一种制备氰乙基醚的生产工艺。
Sodium in liquid ammonia—a versatile tool in modifications of arylphosphine oxides
作者:Marek Stankevič、Adam Włodarczyk、Magdalena Jaklińska、Renata Parcheta、K. Michał Pietrusiewicz
DOI:10.1016/j.tet.2011.09.045
日期:2011.11
modifications of tertiary arylphosphine oxides based on their reaction with sodium in liquid ammonia is presented. Depending on the structure of the starting compounds, either dearomatisation of the phenyl substituent or cleavage of a P-aryl bond from phosphorus atom can be selectively performed and the corresponding (1,4-cyclohexadien-3-yl)phosphine oxides or secondary phosphine oxides were obtained