Patent · US Expired

Preparation of astaxanthin

US5654488A · kind A · utility

8Cited by

6References

5Claims

0Family size

Assignee

BASF SE

Inventors

Wolfgang Krause · Münstermaifeld, DE
Klaus Henrich · Haßloch, DE
Joachim Paust · Schifferstadt, DE
Hansgeorg Ernst · Speyer, DE

Key dates

Filing date	Mar 15, 1996
Grant date	Aug 5, 1997
Priority date	—
Expiry date	Mar 15, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C403/24
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Improved process for the preparation of astaxanthin by Wittig reaction of 2 mol of 3-methyl-5-(2,6,6-trimethyl-3-oxo-4-hydroxy-1-cyclohexenyl)-2,4-pentadieny ltriarylphosphonium salts with one mol of 2,7-dimethyl-2,4,6-octatrienedial avoiding the use of halohydrocarbons as solvents.

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