Hydroxybiphenyl compounds
AssigneeKabushiki Kaisha Tsumurajuntendo
InventorsAkihide Kooda, Itsuo Nishioka, Takeshi Nishiyori, Shoji Yahara
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Abstract
New hydroxybiphenyl compounds of the general formula: ##STR1## wherein R.sub.1 stands for a hydrogen atom or a hydroxyl group, R.sub.2 for a hydrogen atom or a hydroxyl group, R.sub.3 for a hydroxyl group, a group of the formula -CH.sub.2 -CH.dbd.CH.sub.2 or a group of the formula -CH.dbd.CH-CHO, R.sub.4 for a hydrogen atom or a group of the formula ##STR2## and R.sub.5 for a hydroxyl group or a group of the formula ##STR3## These compounds are obtained by extraction of "Tokoboku", i.e. dried cortex of Magnolia officinalis which belongs to the family Magnoliaceae. They are useful as pharmaceuticals or intermediates therefor, in particular as anti-allergics.
Claims11
An hydroxybiphenyl compound of the formula:
- ##STR13## wherein one of R.sub.1 and R.sub.2 is a hydrogen atom and the other is a hydroxyl group and R.sub.3 is a hydroxyl group or a group of the formula --CH.dbd.CH--COH.
A substantially pure hydroxybiphenyl compound of the formula:
- ##STR14## wherein one of R.sub.1 and R.sub.2 is a hydrogen atom and the other is a hydroxyl group and R.sub.3 is a hydroxyl group or a group of the formula --CH.dbd.CH--COH.
A substantially pure hydroxybiphenyl compound of the formula:
- ##STR15## or of the formula:
- ##STR16##
Dependencies are inferred from the claim text.