Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Patent
1986-09-15
1988-07-26
Chan, Nicky
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
514333, 549400, 546257, A61K 3135, C07D31132
Patent
active
047600888
ABSTRACT:
Sulfide derivatives of catechins derived from condensed tannins have broad spectrum biocidal characteristics. Epicatechin-4-alkylsulfides and cupric complexes thereof containing up to 20, preferably 5 to 15, carbon atoms are particularly effective biocides against wood rotting fungi and gram-positive bacteria.
Such sulfides are prepared by reacting condensed tannin, either in the form of a purified tannin extract or comminuted plant tissue, with an appropriate thiol under mild acidic conditions.
REFERENCES:
patent: 3270003 (1966-08-01), van Blaricom et al.
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patent: 3928585 (1975-12-01), Cervelle
patent: 4166861 (1979-09-01), Bonait et al.
patent: 4248789 (1981-02-01), Okada
patent: 4460578 (1984-07-01), Cervelle et al.
Thompson et al., J.C.S., Perkin I, (11), 1387-99 (1972).
Board of Control of Michigan Technological University
Chan Nicky
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