Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1987-09-04
1988-11-29
Shippen, Michael L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
562506, 562401, C07C 69747
Patent
active
047883235
ABSTRACT:
Racemization of optically active chrysanthemic acid or its ester of the formula: ##STR1## wherein R represents a hydrogen atom or an alkyl, cycloalkyl or aralkyl group of 1-20 carbon atoms and * indicates an asymmetric carbon atom, is effected by contacting it with hydrogen bromide or a phosphorus bromide compound. This method may also be effected in the presence of a peroxide or an azo compound. This method is industrially very useful.
REFERENCES:
patent: 3282984 (1966-11-01), Matsui et al.
patent: 3657086 (1972-04-01), Matsui et al.
patent: 3794680 (1974-02-01), Matsui
patent: 3989750 (1976-11-01), Nagase et al.
patent: 4182906 (1980-01-01), Suzukamo et al.
patent: 4473703 (1984-09-01), Suzukamo
patent: 4485257 (1984-11-01), Suzukamo et al.
patent: 4644080 (1987-02-01), Suzukamo et al.
patent: 4659864 (1987-04-01), Suzukamo et al.
Fukao Masami
Hagiya Koji
Sakito Yoji
Suzukamo Gohfu
Shippen Michael L.
Sumitomo Chemical Company Limited
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