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:
Mar. 31, 2015
Filed:
Jul. 10, 2012
Joaquim Henrique Teles, Waldsee, DE;
Michael Limbach, Worms, DE;
Richard Dehn, Ludwigshafen, DE;
Stephan Deuerlein, Ludwigshafen, DE;
Manuel Danz, Plankstadt, DE;
Joaquim Henrique Teles, Waldsee, DE;
Michael Limbach, Worms, DE;
Richard Dehn, Ludwigshafen, DE;
Stephan Deuerlein, Ludwigshafen, DE;
Manuel Danz, Plankstadt, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention provides a process for preparing cycloheptene and derivatives thereof by ring-closing metathesis of unsymmetric 1,8-dienes whose C—C double bond at the 8 position is nonterminal. Cycloheptene and the cycloheptanone, cycloheptylamine, cycloheptanecarbaldehyde, cycloheptanecarboxylic acid and cycloheptanecarbonyl chloride conversion products thereof, and the derivatives thereof, are important synthesis units for active ingredient compounds. The ring-closing metathesis is preferably performed as a reactive distillation. The unsymmetric 1,8-dienes for the ring-closing metathesis can be obtained by catalytic decarbonylation or oxidative decarboxylation from the corresponding unsaturated carboxylic acids or carboxylic acid derivatives.