Patent · US Active

Process for preparing cycloheptene

US8993819B2 · kind B2 · utility

0Cited by

9References

15Claims

0Family size

Assignee

BASF SE

Inventors

Joaquim Henrique Teles · Waldsee, DE
Michael Limbach · Worms, DE
Richard Dehn · Ludwigshafen, DE
Stephan Deuerlein · Ludwigshafen, DE
Manuel Danz · Plankstadt, DE

Key dates

Filing date	Jul 10, 2012
Grant date	Mar 31, 2015
Priority date	—
Expiry date	Mar 12, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/10
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.