Process for preparing cyclic phosphines
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United States of America Patent
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Apr 8, 2003
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N/A
app pub date -
Jul 6, 2000
filing date -
Nov 7, 1997
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Abstract
The present invention concerns the preparation of a cyclic phosphine from the corresponding primary phosphine and a bifunctional alkylating agent, wherein alkylation, and displacement of each functional group, occurs in the presence of a strong base, is modified by adding the strong base, in an amount sufficient for cyclisation, to a preformed mixture or reaction product of the primary phosphine and the alkylating agent.
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