Preparation of transition metal catalysts from phosphonium salts

Details Preparation of transition metal catalysts from phosphonium salts Preparation of transition metal catalysts from phosphonium salts

1998-11-24

1999-10-26

Nazario-Gonzalez, Porfirio

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

556136, 568 9, 568 10, 568451, 568454, C07F 1500, C07C 4500

Patent

active

059731745

ABSTRACT:
A method is provided to prepare a cationic transition metal catalyst, the method including the steps of: providing a disubstituted phosphine selected from the group consisting of RPH and R.sub.1 R.sub.2 PH wherein R is a divalent group selected from substituted and nonsubstituted hydrocarbon groups, R.sub.1 and R.sub.2 are independently selected from substituted and nonsubstituted hydrocarbon groups; combining the disubstituted phosphine with a salt of the formula R.sub.3 X.sub.n wherein X is a good leaving group and is a weakly coordinating anion and R.sub.3 is a substituted or nonsubstituted aliphatic hydrocarbon and n is 1, 2, or 3 to form a phosphonium salt of a formula selected from R.sub.3 (RP.sup.+ H).sub.n nX.sup.- and R.sub.3 (R.sub.1 R.sub.2 P.sup.+ H).sub.n nX.sup.- ; and combining the phosphonium salt with a transition metal salt of the formula MY.sub.m wherein M is a transition metal, and Y is the anion of a weak acid thereby forming a cationic transition metal catalyst.

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