PROCESS FOR PRODUCING (±)-3a,6,6,9a-TETRAMETHYL DODECAHYDRONAPHTHO[2,1-b]FURANS

Title:

PROCESS FOR PRODUCING (±)-3a,6,6,9a-TETRAMETHYL DODECAHYDRONAPHTHO[2,1-b]FURANS

Document Type and Number:

WIPO Patent Application WO/2010/092872

Kind Code:

A8

Abstract:

The present invention relates to a process for producing (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,l-b]furans from crude (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,l-b]furans obtained by subjecting (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,l-b]furan-2(lH)-ones which are produced by cyclizing a homofarnesylic acid amide or a monocyclohomofarnesylic acid amide in the presence of an acid agent and then hydrolyzing the cyclized product, to reduction reaction and then to cyclization reaction, said process including (i) an alkali treatment step in which the crude (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,l-b]furans are heated in the presence of an alcohol and a metal hydroxide; and (ii) a washing treatment step in which the crude (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,l-b]furans are washed with an aqueous acid solution. The thus obtained (±)-3a,6,6,9a-tetramethyl dodecahydronaphtho[2,l-b]furans have a less off-odor and hardly suffer from deterioration of their smell during storage.

Inventors:

TANINO KENJI (JP)
AOKI TAKASHI (JP)

Application Number:

PCT/JP2010/051068

Publication Date:

May 12, 2011

Filing Date:

January 21, 2010

Export Citation:

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Assignee:

KAO CORP (JP)
TANINO KENJI (JP)
AOKI TAKASHI (JP)

International Classes:

C07D307/93

Attorney, Agent or Firm:

OHTANI, Tamotsu et al. (Bridgestone Toranomon Bldg.6F, 25-2 Toranomon 3-chome, Minato-ku, Tokyo, JP)

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