Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – By addition of entire unsaturated molecules – e.g.,...
Reexamination Certificate
2005-12-09
2009-02-17
Lu, Caixia (Department: 1796)
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
By addition of entire unsaturated molecules, e.g.,...
C585S511000, C502S162000
Reexamination Certificate
active
07491859
ABSTRACT:
Process for the telomerization of a conjugated diene,wherein the conjugated diene is reacted with a compound containing an active hydrogen atom and having a formula R′—H in the presence of a telomerization catalyst based on:(a) a source of group VIII metal,(b) a bidentate ligandwherein the bidentate ligand has the general formula Iin-line-formulae description="In-line Formulae" end="lead"?R1R2M1-R-M2R3R4 (I)in-line-formulae description="In-line Formulae" end="tail"?wherein M1and M2are independently P, As or Sb; R1, R2, R3and R4independently represent a monovalent aliphatic group;or R1, R2and M1together and/or R3, R4and M2together independently represent an optionally substituted aliphatic cyclic group with at least 5 ring atoms, of which one is the M1or M2atom, respectively;R represents a bivalent organic bridging group; and novel bidentate diphosphines which can be used in this process.
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Drent Eit
Eberhard Michael Rolf
Pringle Paul Gerald
van der Made Renata Helena
Haas Donald F.
Lu Caixia
Shell Oil Company
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