Hydrogenation catalyst, process for the preparation thereof and hydrogenation process
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United States of America Patent
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Apr 17, 2001
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N/A
app pub date -
Mar 11, 1999
filing date -
Feb 2, 1994
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Abstract
Reaction products of an iridium(III) salt or a hydrate thereof, a diphosphine having secondary phosphine groups and a metal or ammonium chloride, bromide or iodide are excellent hydrogenation catalysts for ketimine. Using chiral diphosphines and prochiral ketimines, diastereoisomeric secondary amines are obtained in high optical yields.
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