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:
Jan. 20, 1981
Filed:
Oct. 18, 1978
Applicant:
Inventors:
Akira Yamamoto, Joetsu, JP;
Kenichi Taguchi, Joetsu, JP;
Akira Hayashida, Joetsu, JP;
Toshinobu Ishihara, Niigata, JP;
Assignee:
Shin-Etsu Chemical Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603 / ; 2603 / ;
Abstract
A novel class of tetrahydropyran-5-one compounds are provided which are 2-alkoxy- or 2-acyloxy-3,4-dihalogeno-6-alkyl tetrahydropyran-5-ones expressed by the general formula ##STR1## where R.sup.1 is an alkyl group, R.sup.2 is an alkyl or an acyloxy group and X is a halogen atom. The compounds are synthesized by the reaction of a 2-furyl carbinol compound with a halogen in the presence of an alcohol or a carboxylic acid. The compounds are useful as an intermediate for the synthetic preparation of various useful compounds including maltol as a flavor.