Process for producing keraflavin

Application Number: 00108015
Application Date: 2000.06.08
Publication Number: 1277191
Publication Date: 2000.12.20
Priority Information: 1999/6/9 JP 162577/1999
International: C07C403/24
Applicant(s) Name: Kuraray Co., Ltd.
Inventor(s) Name: Mori Toshiki;Katatyama Naoyuki;Kanuchiya Shikitsutomu
Patent Agency Code: 11219
Patent Agent: ding yebeng
Abstract The invention provides a process for producing canthaxanthin comprising the step of oxidizing beta -carotene with an alkali metal chlorate or an alkali metal bromate in water and an organic solvent immiscible with water, wherein the oxidization reaction is started by adding: a) an iodine halide or iodine, and b) a metal iodide, to a mixture of beta -carotene, water, the organic solvent immiscible with water, and the alkali metal chlorate or the alkali metal bromate, which process can produce canthaxanthin for a short time, with efficiency and in an industrially advantageous manner.