Organic compounds -- part of the class 532-570 series – Organic compounds – Nitriles
Reexamination Certificate
2005-01-18
2005-01-18
Zucker, Paul A. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitriles
C560S201000, C562S595000
Reexamination Certificate
active
06844463
ABSTRACT:
Process for the carbonylation of n-pentenoic acid or its derivatives of the formula (I)in-line-formulae description="In-line Formulae" end="lead"?C4H7—R1 (I)in-line-formulae description="In-line Formulae" end="tail"?where R1is —CN or COOR2where R2is hydrogen, alkyl or aryl by reaction of a compound of the formula (I) with carbon monoxide and a compound (II) containing a hydroxyl group in the presence of a catalyst system, wherein the catalyst system is obtainable by reaction ofa) a source for a metal ion of a metal (III) of the 8th subgroup of the Periodic Table of the Elements withb) a bidentate phosphine ligand of the formula (IV)in-line-formulae description="In-line Formulae" end="lead"?(R3R4R5C)(R6R7R8C)P-L1-X-L2-P(CR9R10R11) (CR12R13R14) (IV)in-line-formulae description="In-line Formulae" end="tail"?whereR3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14independently of one another is an organic radical which in each case contains a carbon atom, via which the respective radical is linked to the relevant tertiary carbon atom mentioned in formula (IV);L1, L2independently of one another are a lower alkylene group;X is an arylene group.
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XP-002198096 1998.
Röper Michael
Schäfer Martin
Slany Michael
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