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Kuraray Co Ltd
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Kuraray Co Ltd
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Priority to JP56056168ApriorityCriticalpatent/JPH0230334B2/en
Publication of JPS57170930ApublicationCriticalpatent/JPS57170930A/en
Publication of JPH0230334B2publicationCriticalpatent/JPH0230334B2/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
PURPOSE: To obtain a novel polyprenyl compound suitable for a synthetic raw material for dricol which is used for a medicine or base for cosmetic, by extracting a specific polyprenol (ester) from a plant body with an organic solvent.
CONSTITUTION: (A) A plant body containing a polyprenol (ester derivative) of formulaI(m is the number of trans isoprene units and 2; n is the number of cis isoprene units and an integer 11W19 is extracted with an organic solvent, e.g. chloroform, to give the extracted polyprenol (ester derivative). The resultant extract is then hydrolyzed, esterified or subjected to the ester interchange if necessary to give the aimed novel polyprenyl compound of formula II (A is hydroxyl group, acyloxy or halogen atom). A leaf of a ginkgo is preferrred as the plant body.
Polyenoic acids omega-substituted by a 4,5-dimethoxy-2-methyl-quinone or a 4,5-dimethoxy-2-methyl-phenyl group,process for the preparation thereof and pharmaceutical compositions containing the same
N-monohydroxypropylamides, n-dihydroxypropylamides and their acetonoides of all-e and 13-z retinoic acid, process for their preparation and pharmaceutical compositions containing them
DELTA-1,3,5-3-CHLORINE-11-BETA,16-ALPHA,17-ALPHA,2-TETRA-(HYDROXY)-PREGNAN-20-ONE-16,17ACETONIDE DERIVATIVES, PROCESS FOR THEIR PREPARATION AND COMPOUNDS CONTAINING THESE DRUG.