Process for the preparation of sennosides A and B

Details Process for the preparation of sennosides A and B Process for the preparation of sennosides A and B

1994-12-16

1996-11-12

Kight, John

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 41, 536 185, 536127, C07H 100, A61K 3170

Patent

active

055741517

ABSTRACT:
The invention concerns a process for the preparation of sennosides A and B, wherein rheinanthrone-8-glucoside is oxidized with oxygen or an oxygen source to the sennosides A and B. According to the invention, the oxidation is carried out using active carbon as a catalyst, and, if desired, the obtained sennosides A and B are converted to their calcium salts using methanol precipitation from a calcium ion containing aqueous solution.

REFERENCES:
patent: 4256875 (1981-03-01), Gabriel et al.
patent: 4402944 (1983-09-01), Callahan et al.
patent: 4511561 (1985-04-01), Madaus et al.
patent: 4595592 (1986-06-01), Hietala
patent: 5232699 (1993-08-01), Colliopoulos
patent: 5391775 (1995-02-01), Carcasona et al.
patent: 5393898 (1995-02-01), Carcasona et al.
Progress in the Chemistry of Natural Products, Stoll et al., Springer-Verlag, pp. 248-269, (1950).

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