Abstract: The present application relates to a process for preparing a halogenated organophosphine, comprising reacting a primary or secondary organophosphine with a halogenating agent selected from (A) a compound of formula (I): (HaI)3C—C(O)—X (I) wherein X is selected from alkyl, aryl, aralkyl, alkaryl, cycloalkyl, NR1R2, C(HaI)3, OR3, -0—C(O)—R3?, or —Y—Z—Y—C(O)—C(HaI)3; R1 and R2 are each independently selected from hydrogen, alkyl, aryl, aralkyl, alkaryl, or cycloalkyl; R3 is selected from H, alkyl, aryl, aralkyl, alkaryl, cycloalkyl, or triorganosilyl; R3? is selected from C(HaI)3, alkyl, aryl, aralkyl, alkaryl, cycloalkyl; Y is independently selected from 0 or NH; Z is independently selected from alkylene, arylene, aralkylene, alkarylene, or cycloakylene; and Hal is selected from Cl or Br; or (B) a derivative of a polyol, polyamine or polyaminoalcohol comprising two or more hydroxyl and/or amino groups, in which a hydrogen atom in each of the hydroxyl and/or amino groups is replaced with a group —C(O)—C(HaI)3, w

Abstract: This invention provides a process for the preparation of a diphosphinoarene, a corresponding phosphine oxide, or a corresponding phosphine sulphide, and derivatives thereof, which comprises reacting a primary or secondary phosphine, phosphine oxide, or phosphine sulphide with an aryl compound bearing two leaving groups attached to two different carbon atoms of the arylene bring system, in the presence of a catalyst comprising a Group VIIIa metal. Diphosphinoarenes may be used as ligands for metal catalysts, as solvent extractants for certain metals, and as flame retardants in polyester and polyurethane applications.

Abstract: Mono- and di-arylphosphines are prepared by reacting an aryl compound that has a leaving group attached to a carbon atom of the aromatic ring with phosphine in the presence of a Group VIII metal catalyst.