Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1986-10-24
1988-10-18
Shippen, Michael L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
560226, C07C 6974
Patent
active
047789204
ABSTRACT:
For the production of chlorine-free cyclopropanecarboxylic acid esters, gamma-butyrolactone and butanol are reacted, in a first step, with hydrogen chloride in the absence of a catalyst at a temperature of 120.degree.-140.degree. C., the resultant gamma-chlorobutyric acid butyl ester is cyclized at 100.degree.-200.degree. C. with a solution of a sodium alcoholate in the corresponding alcohol of 4 or more carbon atoms and this product is optionally interestified in a third step with a higher-boiling alcohol of more than 4 carbon atoms. The second and third steps can be performed in one step, if desired.
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Huels Aktiengesellschaft
Shippen Michael L.
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