Sri International

Alexander Van Der Made

Roelof Van Ginkel

Jan De With

Wolf Eilenberg

Ursula Eilenberg-Robben, Legal Representative

This invention relates to processes for making phosphorus compounds RP&#x2014;X&#x2014;PR, RP-M, RP-L and RP, and the novel cation RP(L)-X&#x2014;P(L)R, where R represents an optionally substituted hydrocarbyl group, X represents a bridging group, L represents a leaving group and M represents an alkali metal atom. The invention relates further to a process for making a compound RP-L from a compound R&#x2014;H via a new process for making the compound R&#x2014;Li followed by its reaction with a compound HalP-L. The compound RP&#x2014;X&#x2014;PRis a ligand suitable for making catalysts for copolymerizing carbon monoxide and a olefinically unsaturated compound.

Preparation of phosphorus-containing compounds useful in the preparation of biphosphine ligands

This invention relates to processes for making phosphorus compounds R P&mdash;X&mdash;PR , R P-M, R P-L and R P, and the novel cation R P (L)-X&mdash;P (L)R , where R represents an optionally substituted hydrocarbyl group, X represents a bridging group, L represents a leaving group and M represents an alkali metal atom. The invention relates further to a process for making a compound R P-L from a compound R&mdash;H via a new process for making the compound R&mdash;Li followed by its reaction with a compound Hal P-L. The compound R P&mdash;X&mdash;PR is a ligand suitable for making catalysts for copolymerizing carbon monoxide and a olefinically unsaturated compound.

This invention relates to processes for making phosphorus compounds R P&mdash;X&mdash;PR , R P&mdash;M, R P&mdash;L and R P, and the novel cation R P (L)&mdash;X&mdash;P (L)R , where R represents an optionally substituted hydrocarbyl group, X represents a bridging group, L represents a leaving group and M represents an alkali metal atom. The invention relates further to a process for making a compound R P&mdash;L from a compound R&mdash;H via a new process for making the compound R&mdash;Li followed by its reaction with a compound Hal P&mdash;L. The compound R P&mdash;X&mdash;PR is a ligand suitable for making catalysts for copolymerizing carbon monoxide and a olefinically unsaturated compound.

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Amsterdam, Netherlands

Alexander Van Der Made