Preparation of phosphine ligands
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United States of America Patent
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Nov 26, 2002
Grant Date -
Aug 2, 2001
app pub date -
Mar 29, 2001
filing date -
Apr 2, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for the preparation of a compound having the formula R.sup.3 R.sup.4 P--Ar--CO--X wherein Ar is an aryl group bearing the PR.sup.3 R.sup.4 and COX groups in a 1,2-relationship, and optionally bearing also one or more non-interfering groups, R.sup.3 and R.sup.4 are each a hydrocarbon group optionally substituted by any non-interfering group, and X is OH or a non-interfering group, comprises (i) the reaction of NaPR.sup.3 R.sup.4 with F--Ar--COX, or (ii) when X is an amine group, the reaction of R.sup.3 R.sup.4 P--Ar--COOY, OY being OH or a leaving group, with a solution of the amine obtained in situ by adding a base to a salt thereof. Certain ligands prepared by such a process are in a novel, crystalline form.
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