Title:
PRODUCTION OF LACTONES
Document Type and Number:
Japanese Patent JP3478344
Kind Code:
B2
Abstract:
PURPOSE: To obtain a lactone compound useful as perfumes, medicines and agricultural chemicals or their synthetic intermediates by reacting a cycloalkanone with a peracetic acid in the presence of an acid anhydride in oxidizing the cycloalkanone with the peracetic acid.
CONSTITUTION: When a cycloalkanone of formula I (R1 and R2 are H or hydrocarbon residues; R3 is alkylene) is oxidized with peracetic acid, the reaction is carried out in the presence of an acid anhydride, e.g. acetic anhydride, propionic anhydride, benzoic anhydride or succinic anhydride in an amount of about 0.5-10 times by weight based on the cycloalkanone to provide a lactone of formula II [e.g. 6-(2-pentynyl)-tetrahydro-2-pyranone]. As the acid anhydride added into the reactional system, especially the anhydride of a saturated linear aliphatic carboxylic acid is preferably used. Since lactones of formula II, e.g. δ-decanolactone or δ-dodecanolactone have characteristic aroma, these lactones are used as flavors for food additives.
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Inventors:
Hiroshi Fujisawa
Application Number:
JP33805992A
Publication Date:
December 15, 2003
Filing Date:
November 25, 1992
Export Citation:
Assignee:
Nippon Zeon Co., Ltd.
International Classes:
C07D307/33; C07D307/32; C07D309/30; C07D313/04; C07D313/18; C07D315/00; (IPC1-7): C07D309/30; C07D307/32; C07D313/04; C07D313/18; C07D315/00
Domestic Patent References:
JP604179A | ||||
JP57209285A | ||||
JP57209284A | ||||
JP57126484A | ||||
JP5069008A | ||||
JP57188584A | ||||
JP5132694A |
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