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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.:

US 4268445 B1

PDFFull Text
Date of Patent:
May. 19, 1981

Filed:

Jan. 31, 1980

Preparation of bicyclic enol-ethers, and novel ethers of

Applicant:
Inventors:

Rudolf Kropp, Limburgerhof, DE;

Frank Thoemel, Weinheim, DE;

Axel Nuerrenbach, Gruenstadt, DE;

Werner Hoffman, Neuhofen, DE;

Franz Wenisch, Frankenthal, DE;

Hartwig Fuchs, Ludwigshafen, DE;

Assignee:

BASF Aktiengesellschaft, , DE;

Attorney:

Keil & Witherspoon

Primary Examiner:

Nicky Chan

Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
2603452 ; 2603 / ; 2603478 ; 568347 ; 568375 ; 568376 ; 568379 ;
Abstract

The preparation of bicyclic enol-ethers (I) ##STR1## (where n is from 3 to 12, and R.sup.1, R.sup.2 and R.sup.3 may be H or C.sub.1 --C.sub.4 -alkyl) by free radical adduct formation of CHR.sup.1 =CR.sup.2 --CHR.sup.3 --O--R.sup.4 (III)(where R.sup.4 is tert.-butyl, tetrahydrofuran-2-yl or tetrahydropyran-2-yl) with a cyclic ketone (IV) ##STR2## followed by acid-catalyzed cyclization, and novel compounds II ##STR3## The compounds (I) and (II) are intermediates for the synthesis of musk-like fragrances.

Find Patent Forward Citations

Kropp, Rudolf. (1981). Preparation of bicyclic enol-ethers, and novel ethers of (U.S. Patent No. 4268445). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4268445

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