Process for preparation of dibenzocyclooctadiene type lignan
US5484595A · kind A · utility
5Cited by
7References
10Claims
0Family size
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Key dates
| Filing date | Apr 6, 1990 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Apr 6, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08H6/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A dibenzocyclooctadiene type lignan can be efficiently prepared by extracting a plant containing a dibenzocyclooctadiene type lignan with a low polar solvent, subjecting the resulting extract to partition extraction with a water-insoluble low polar solvent and a water-soluble high polar solvent, at least one time, and recovering the dibenzocyclooctadiene type lignan from the layer of the water-soluble high polar solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.