Title:
PRODUCTION OF IONONE COMPOUND
Document Type and Number:
Japanese Patent JP3117803
Kind Code:
B2
Abstract:
PURPOSE: To obtain in high yield an ionone compound useful in the perfume sector without causing any environmental pollution by ring closure of a specific 10-methylundeca-5,9-diene-2-one compound through its contact with a cation exchange resin having macroreticular structure.
CONSTITUTION: A 10-methylundeca-5,9-diene-2-one compound of formula I (when R1 and R2 are each H and R5 is methyl, or when R1 and R5 are each H and R2 is methyl, R3 and R4 are combined with each other into a bond; when R4 and R5 are each H and R3 is methyl, R1 and R2 are combined into ethylidene) is brought into contact with a cation exchange resin having macroreticular structure with the functional group being sulfonate group, ≤3wt.% in water content and 40-50m2/g in specific surface area to carry our ring closure reaction, thus obtaining the objective ionone compound, e.g. α-isomethylionone of formula II or γ-ionone of formula III, in high yield without any environmental pollution due to the industrial wastewater involving the acid catalyst used for the production.
Inventors:
Tsutomu Kakizawa
Kiyoshi Takayama
Kiyoshi Takayama
Application Number:
JP21661292A
Publication Date:
December 18, 2000
Filing Date:
July 23, 1992
Export Citation:
Assignee:
Takasago International Corporation
International Classes:
B01J31/10; C07B61/00; C07C45/67; C07C49/21; C07C403/16; (IPC1-7): C07C403/16; B01J31/10; C07C45/67; C07C49/21
Domestic Patent References:
| JP574931A |
Other References:
Ｍａｓｌｏ−Ｚｈｉｒ．Ｐｒｏｍ−ｓｔ．（３），３２−３３（１９７８）
Ｐｉｓｈｃｈ．Ｐｒｏｍ−ｓｔ．（１１），５５−５６（１９９０）
Ｐｉｓｈｃｈ．Ｐｒｏｍ−ｓｔ．（１１），５５−５６（１９９０）
Attorney, Agent or Firm:
Nobuo Ono (1 outside)