6,6'-Bis-(1-Phosphanorbornadiene) diphosphines, their preparation and their uses
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United States of America Patent
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Issued Date -
Aug 28, 2003
app pub date -
Jan 15, 2003
filing date -
Mar 4, 1997
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Abandoned
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Abstract
A subject of the present invention is new 6,6'-bis-(1-phosphanorbornadiene-) diphosphines, their preparation process and their use in asymmetrical catalysis. The new diphosphines correspond to general formula (I): 1 in which R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 are as defined in claim 1.
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