Polyprenyl composition or compounds and process for the producti

Details Polyprenyl composition or compounds and process for the producti Polyprenyl composition or compounds and process for the producti

1987-08-05

1989-12-12

Evans, J. E.

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

Organic compounds

Carboxylic acid esters

560261, 568875, 5689095, C07C 2986, C07C 3302, C07C 6758, C07C 69007

Patent

active

048869040

ABSTRACT:
A polyprenyl composition consisting essentially of a mixture of polyprenyl compounds represented by the following formula ##STR1## wherein A.sub.1 represents a hydroxyl or acetyloxy group, ##STR2## represents a trans-isoprene unit, ##STR3## represents a cis-isoprene unit, and n is an integer of from 11 to 19, said mixture containing substantial amounts of at least three compounds of formula (I) wherein n represents 14, 15 and 16 respectively as essential ingredients in a total amount of at least 70% by weight based on the weight of the mixture; and new compounds derived from the polyprenyl compounds of formula (I). These composition and compounds are useful for the synthesis of mammalian dolichols. The polyprenyl composition can be prepared by extracting the leaves of Ginkgo biloba or Cedrus deodara with an oil-soluble organic solvent; if required, hydrolyzing the extract; and subjecting the extract to one or more of chromatography, fractional dissolution, fractional refrigerating precipitation and molecular distillation, thereby separating and recovering a fraction having a specified Rf value in silica thin-layer chromatography.

REFERENCES:
patent: 4325974 (1982-04-01), Yamatsu et al.
patent: 4668820 (1987-05-01), Ibata et al.

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