The stereochemistry of organic derivatives of phosphorus. Part III. The synthesis and optical resolution of a spirocyclic phosphonium salt possessing molecular dissymmetry
作者:F. A. Hart、Frederick G. Mann
DOI:10.1039/jr9550004107
日期:——
US4257973A
申请人:——
公开号:US4257973A
公开(公告)日:1981-03-24
Water soluble phosphines VII. Palladium-catalyzed PC cross coupling reactions between primary or secondary phosphines and functional aryliodides — a novel synthetic route to water soluble phosphines
IC6H4-X or IH3-XY in organic solvents (dimethylacetamide, acetonitrile, methanol) using organic amines or potassium and sodium acetate as bases. If the primary phosphine is employed in the appropriate stoichiometric ratio, functionalized secondary phosphines, e.g. Ph(H)PC6H4-p-SO3Na, may be obtained selectively.
Chiral Dirhodium(II) Catalysts with Orthometalated Aryl Phosphine Ligands: Synthesis and Application for Enantioselective C−H Insertion of α-Diazo Ketones
Racemic dirhodium(II) complexes derivedfrom orthometalated aryl phosphines, Rh2(O2CCH3)2(pc)2 (pc = orthometalated phosphine, with head-to-tail arrangement) (1−7), are isolated as pure enantiomers by conventional resolution methods. They are the first examples of dirhodium(II) chiral catalysts without chiral ligands. These compounds have been used in the cyclization of α-diazo ketones; the influence