Drug – bio-affecting and body treating compositions – Plant material or plant extract of undetermined constitution...
Reexamination Certificate
2002-04-11
2004-12-07
Meller, Michael (Department: 1654)
Drug, bio-affecting and body treating compositions
Plant material or plant extract of undetermined constitution...
Reexamination Certificate
active
06827949
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a wood preservative, particularly a wood attacking-, decaying- and staining-inhibitory composition. More particularly, to a wood attacking-, decaying- and staining-inhibitory composition against a wood damage by an insect which is harmful to wood such as termites and
Lyctus brunneus
Stephens which damage a building or a furniture made of wood and also by a wood decaying microorganism including a brown-rot fungus such as
Fomitopsis palustris
and a white-rot fungus such as
Trametes versicolor
and also against a dirt by a wood-staining fungus such as
Aspergillus niger
and
Aureobasidium pullulans
, as well as a method and use for producing the same.
BACKGROUND OF THE INVENTION
Various known wood preservatives are employed in order to control insects harmful to wood, such as termites and
Lyctus brunneus
Stephens and also to prevent decaying by a wood-rot fungus such as
Fomitopsis palustris
and
Coniophora puteana
or a staining by a wood-staining fungus such as
Aspergillus niger
and
Aureobasidium pullulans
. However, any of such known wood preservatives badly affects the safety in humans and animals as well as the environment, and may destroy the ecosystem of nature.
An objective of the present invention is to provide a wood preservative which exhibits an excellent insect-controlling activity against a harmful insect as well as a high anti-decaying activity against a wood-rot fungus and a high antifungal activity against a fungal growing in wood and staining the wood.
Another objective of the invention is to provide a wood preservative that is highly safe to humans and animals and does not affect the environment adversely.
Still another objective of the invention is to provide a wood preservative capable of controlling an insect harmful to a wood, a wood-rot fungus and a wood-staining fungus reliably and efficiently.
SUMMARY OF THE INVENTION
In order to accomplish the objectives described above, the inventors have conducted extensive study to examine various material and compounds and have found that a
Piper methysticum
plant or a processed product thereof, or a chemical compound obtainable from the plant or derivatives thereof exhibit an excellent effect for preserving wood without any bad influence on mammals and environment.
Thus, the present invention is:
1. A wood preservative comprising as an active ingredient a
Piper methysticum
plant or a processed product thereof, or a compound represented by Formula (I):
wherein R
1
, R
2
, R
3
, R
4
and R
16
are same or different and each denotes a hydrogen atom, hydroxy or a C
1-4
alkoxy, or R
1
and R
2
are taken together to form a group represented by —O—(CH
2
)
n
—O— wherein n is an integer of 1 to 3, R
5
is a C
1-4
alkoxy and X is —CH═CH—, —CH
2
—CH
2
— or epoxyethylene, and the bond:
denotes a single bond or a double bond.
2. The wood preservative according to 1. which is an insect-controlling agent.
3. The wood preservative according to 1. which is an anti-decaying agent.
4. The wood preservative according to 1. which is an anti-fungal agent.
5. The wood preservative according to 1. which is a termite-controlling agent.
6. The wood preservative according to 1. wherein said
Piper methysticum
plant or processed product thereof is a stem, leaf or root of a
Piper methysticum
plant or a processed product thereof.
7. The wood preservative according to 6. wherein the processed product is a dry powder or an extract of a stem, leaf or root of
Piper methysticum.
8. The wood preservative according to 1. wherein the compound represented by the formula (I) is a compound represented by Formula (II):
wherein R
6
is hydroxy or a C
1-4
alkoxy, R
7
is a hydrogen atom, hydroxy or a C
1-4
alkoxy, or R
6
and R
7
are taken together to form a group represented by —O—(CH
2
)
n
—O— wherein n is 1 or 2, R
8
is a hydrogen atom or a C
1-4
alkoxy, R
9
is hydroxy or a C
1-4
alkoxy, R
17
is a hydrogen atom, hydroxy or a C
1-4
alkoxy and X is defined as described above, or a compound represented by Formula (III):
wherein R
10
is a hydrogen atom, hydroxy or a C
1-4
alkoxy, R
11
is a hydrogen atom or hydroxy, or R
10
and R
11
are taken together to form a group represented by —O—(CH
2
)
n
—O— wherein n is 1 or 2, R
12
is a hydrogen atom or hydroxy, R
13
is a C
1-4
alkoxy, R
18
is a hydrogen atom, hydroxy or a C
1-4
alkoxy and X is defined as described above.
9. The wood preservative according to 1. wherein a compound represented by Formula (I) is:
(1) kawain, or kavain
(2) 7,8-dihydrokawain, or 7,8-dihydrokavain
(3) yangonin,
(4) 5,6,7,8-tetrahydroyangonin,
(5) methysticin,
(6) 7,8-dihydromethysticin,
(7) cis-5-hydroxykawain, or cis-5-hydroxykavain
(8) 11-methoxy-12-hydroxy-5,6-dehydrokawain, or 11-methoxy-12-hydroxy-5,6-dehydrokavain
(9) 7,8-dihydroyangonin,
(10) 5,6-dihydroyangonin,
(11) 11-methoxyyangonin,
(12) 10-methoxyyangonin,
(13) 11-hydroxyyangonin or,
(14) 5,6-dehydromethysticin.
10. The wood preservative according to 1. wherein the compound represented by the formula (I) is a compound represented by Formula (IV):
wherein each of R
14
and R
15
is a hydrogen atom or they are taken together to form methylenedioxy, and X is defined as described above.
11. A method for preserving wood which comprises treating wood with an effective amount of a
Piper methysticum
plant or processed product thereof, or a compound represented by Formula (I).
wherein R
1
, R
2
, R
3
, R
4
and R
16
are same or different and each denotes a hydrogen atom, hydroxy or a C
1-4
alkoxy, or R
1
and R
2
are taken together to form a group represented by —O—(CH
2
)
n
—O— wherein n is an integer of 1 to 3, R
5
is a C
1-4
alkoxy and X is —CH═CH—, —CH
2
—CH
2
— or epoxyethylene, and the bond:
denotes a single bond or a double bond.
12. Use of a
Piper methysticum
plant or processed product thereof, or the compound represented by the formula (I) for a production of the wood preservative.
REFERENCES:
patent: 8-133941 (1996-05-01), None
patent: 9-328493 (1997-12-01), None
patent: 2001-316260 (2001-11-01), None
S. Tawata et al., “Syntheses and Biological Activities of Dihydro-5,6-dehydrokawain Derivatives”, Biosci. Biotech. Biochem., vol. 60, No. 10, pp. 1643-1645, 1996.
C.P. Locher et al., “Anti-microbial activity and anti-complement activity of extracts obtained from selected Hawaiian medicinal plants”, Journal of Ethnopharmacology, vol. 49, pp. 23-32, 1995.
Executive Summary Kava Kava, No. 1998, 12 pages.
G. Boonen et al., “Influence of Genuine Kavapyrone Enantiomers on the GABA, Binding Site”, Planta Medica, vol. 64, 1998, pp. 504-506.
F. Keller et al., “LLOYDIA”, vol. 26, No. 1, Mar. 1963, pp. 1-15.
T. Reffstrup et al., “The preparation of 4-Hydroxy-5,6-dihydro-2-pyrones and Their Conversion to Kawa-lactones as well as to Other Precursors of Naturally Occuring 2-Pyrones”, Acta Chemical Scandinavica B30, 1976, pp. 613-618.
Iinuma Munekazu
Yoshida Shinji
Meller Michael
Takeda Chemical Industries Ltd.
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