The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 1997
Filed:
Mar. 11, 1996
Applicant:
Inventors:
Hidemichi Fukawa, Tokyo, JP;
Masamichi Nishitani, Tokyo, JP;
Mitsuo Chiba, Tokyo, JP;
Ruriko Murakami, Tokyo, JP;
Assignee:
Toyotama Perfumery Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549326 ; 560174 ; 562577 ;
Abstract
Disclosed are 3,7-dimethyl-4-oxo-7-octenoic acid and its alkyl esters which are intermediates for producing a fragrance, rosefuran and which are represented by: ##STR1## where R is H or a lower alkyl. The compounds [1] are obtained by reacting 2-methyl-3-alkoxycarbonylpropionic acid halide and 3-methyl-3-butenylmagnesium halide. The octenoic acid [1] is treated with acetic anhydride under heat in the presence of an acidic catalyst to give 3,7-dimethyl-2,6-octadien-4-olide. The olide is reduced in an ordinary manner to give rosefuran.