1,4-hydrogenation of dienes with Ru complexes

Chemistry of hydrocarbon compounds – Adding hydrogen to unsaturated bond of hydrocarbon – i.e.,... – By hydrogen transfer from other hydrocarbon

Reexamination Certificate

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C568S687000, C568S903000, C556S136000

Reexamination Certificate

active

08003838

ABSTRACT:
The present invention relates to the use of Ruthenium complexes having cyclopentadienyl derivatives and a diene as ligands, together with some acidic additives for improving the selectivity in the 1,4-hydrogenation of conjugated dienes into the corresponding “cis”-alkene as major product, i.e. wherein the two substituents in position 2,3 of the diene are in a cis configuration in the corresponding alkene.

REFERENCES:
patent: 1 394 170 (2004-03-01), None
patent: WO 2006/051503 (2006-05-01), None
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