Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Patent
1988-02-12
1990-03-06
Chan, Nicky
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
A01N 4316
Patent
active
049066560
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.
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patent: 4248789 (1981-02-01), Okada
patent: 4460578 (1984-07-01), Cervelle et al.
The condensed chemical dictionary, 9th ed., Van Nostrand Reinhold Co., New York, 1977, page 108.
Thompson et al., JCS, Perkin I (11), 1387-99 (1972).
Board of Control of Michigan Technological University
Chan Nicky
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