Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Reexamination Certificate
2005-02-22
2005-02-22
Bell, Mark L. (Department: 1755)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
C556S110000, C548S101000
Reexamination Certificate
active
06858559
ABSTRACT:
Disclosed is an asymmetric copper catalyst composition comprising, as components, (a) an optically active bisoxazoline compound of formula (1):whereinR1and R2are different and each represents a hydrogen atom, an alkyl group, a cycloalkyl group, or a phenyl or aralkyl group which may be substituted,R3and R4each represents a hydrogen atom, an alkyl group, a cycloalkyl group, or a phenyl or aralkyl group which may be substituted, or R3and R4may be bonded to each other to form a C3-5cyclic alkylene group,R5represents a hydrogen atom or a C1-6alkyl group, or the two R5groups may be bonded to each other to represent a C3-5cyclic alkylene group,(b) a monovalent or divalent copper compound, and(c) a strong acid or a Lewis acid or a mixture thereof, and a process for producing an optically active cyclopropanecarboxylate using the same.
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Itagaki Makoto
Suzukamo Gohfu
Yamamoto Michio
Bell Mark L.
Birch & Stewart Kolasch & Birch, LLP
Pasterczyk J.
Sumitomo Chemical Company Limited
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