Optically active rhodium complexes of...

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C - Chemistry, Metallurgy

07

F

260/325.1, 260/5

C07F 9/30 (2006.01) C07F 9/572 (2006.01) C07F 15/00 (2006.01) C08G 18/10 (2006.01) C08G 18/28 (2006.01) C08G 65/329 (2006.01)

Patent

CA 1337723

The invention relates to rhodium complexes of the formula [A - 0 - (CH2CH20)n - A]2+ 2 X- Ia and [A - 0 - (CH2CH20)m - CH3]+ X- Ib in which n = 5-1,000, m = 5- 250, X denotes a tetrafluoroborate, hexafluorophosphate or per-chlorate anion, A denotes a radical of the formula Image II (en)2 denotes two molecules of a monoolefin or one mole- cule of a diolefin Ar denotes phenyl or phenyl which is substituted by one or two alkyl groups having 1 or 2 carbon atoms and R1 denotes an arylene or alkylene bridge, and their use for the preparation of L-phosphinothricin and its derivatives by enantioselective catalytic hydrogenation of 2,3-dehydrophosphinothricin (derivatives).

591406

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