Preparation of hypericin

Details Preparation of hypericin Preparation of hypericin

1990-11-09

1992-06-09

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

20415788, 20415791, 552282, C07C 5100, C07C40100, C07C 5036, A61K 3112

Patent

active

051204126

ABSTRACT:
A process for preparing hypericin comprises oxidative dimerization of emodin anthrone and conversion of the intermediate protohypericin to hypericin by irradiation with visible light.

REFERENCES:
patent: 1935721 (1933-11-01), Kunz et al.
patent: 2707704 (1955-05-01), Brockmann et al.
"Synthese des Proto-hypericins und Hypericins aus Emodin-antron-(9)," Brockmann, H., et al., Chemische Berichte, vol. 91, No. 3, Mar. 1958, pp. 547-553.
"Reactions concerned in tertiary amine N-oxides, XV. Dimerization reactions of anthrone and its derivatives using pyridine N-oxide as oxidizing reagent," Haginiwa, J. et al., Chemical Abstracts, No. 87785a, Columbus, OH, U.S., vol. 99, No. 11, Sep. 12, 1983, p. 532.

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