Patent · US Active

Process for the production of 1,3,3-trimethyl-2-(3-methylpent-2-en-4-ynyl)cyclohex-1-ene

US9067877B2 · kind B2 · utility

1Cited by

0References

9Claims

0Family size

Assignee

DSM IP ASSETS B.V. · NL

Inventors

Werner Bonrath · Kaiseraugst, CH
Thomas Netscher · Bad Krozingen, DE
Jan Schütz · Bad Kötzting, DE
Bettina Wüstenberg · Basel, CH

Key dates

Filing date	Jun 14, 2012
Grant date	Jun 30, 2015
Priority date	—
Expiry date	Jun 14, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2601/16
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to an improved process for the production of 1,3,3-trimethyl-2-(3-methylpent-2-en-4-ynyl)cyclohex-1-ene, highly enriched in the Z-isomer, and the use of such compounds in organic syntheses, especially in processes forming intermediates (building blocks) the synthesis of vitamin A or β-carotene or other carotenoids, e.g. canthaxanthin, astaxanthin or zeaxanthin.

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