Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1991-12-06
1992-09-22
Shippen, Michael L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
560124, C07C 6104
Patent
active
051498693
ABSTRACT:
A process for the production or R,S-2,2-dimethylcyclopropanecarboxylic acid starting from isobutylene oxide and a phosphonoacetic acid trialkyl ester. In this way, first the R,S-2,2-dimethylcyclopropanecarboxylic acid-C.sub.1 -C.sub.4 alkyl ester is formed, which then is hydrolyzed to the corresponding acid. R,S-2,2-Dimethylcyclopropanecarboxylic acid is an important intermediate product for the production of S-(+)-2,2-dimethylcyclopropanecarboxamide.
REFERENCES:
Chemical Abstracts, vol. 7, (1913), p. 3965 and of Chemisches Zentralblatt, (1913), II, pp. 2130 and 2131, both of which abstract N. Kishner, J. Russ. Phys. Chem. Soc., 45, (1913), 57ff.
Patent Abstracts of Japan, E Field, vol. 7, No. 285, Dec. 20, 1983, p. 164 C201.
Chemical Abstracts, vol. 68, No. 29, Japan 1968, p. 2058, 21563e.
E. R. Nelson et al., J. Am. Chem. Soc., 79, (1957), pp. 3467 to 3469.
S. R. Landor et al., J. Chem. Soc. (C), (1967), pp. 2495 to 2500.
Houben-Weyl, "Methoden der organischen Chemie", 4th Ed., vol.: Phosphorverbindungen I, pp. 173 to 176 (1982).
Kampfen Ulrich
Meul Thomas
Lonza Ltd.
Shippen Michael L.
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