Podophyllotoxin purification process

Details Podophyllotoxin purification process Podophyllotoxin purification process

1989-09-29

1991-10-15

Lee, Mary C.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30777

Patent

active

050576160

ABSTRACT:
Podophyllotoxin is recovered from podophyllum resin with improved efficiency by adsorbing impurities out of a solution using a solid adsorbent, preferably alumina. This improvement finds application in an overall process for purifying podophyllotoxin from podophyllum resin in which the podophyllotoxin is first crystallized from the podophyllum resin, the crystals so formed are dissolved and subjected to the solid adsorbent treatment, crystals are then recovered and optionally recrystallized and dried to give the desired product.

REFERENCES:
J. L. Hartwell et al., J. Chem. Soc., 72:245 (1950) (copy not included herewith as reference was included in Applicant's Description of Background Information, p. 2).

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