2-Phenyl-4-pyrone derivatives, their preparation and their use a

Details 2-Phenyl-4-pyrone derivatives, their preparation and their use a 2-Phenyl-4-pyrone derivatives, their preparation and their use a

1980-03-24

1981-10-27

Chan, Nicky

Drug, bio-affecting and body treating compositions

Nonspecific immunoeffector, per se ; or nonspecific...

Lipid or oil

2603457R, 2603458R, 260465B, 560 9, 560 22, 560 23, 560 51, 560 53, 564162, 564166, 564167, 564169, A61K 3135, C07D30932

Patent

active

042973678

ABSTRACT:
The invention relates to new 2-phenyl-4-pyrone derivatives which can be used in agriculture. They correspond to the general formula: ##STR1## in which X.sub.1 and X.sub.2, which are identical or different, each represent a hydrogen or halogen atom, with the proviso that at least one of these substituents represents a halogen atom, R.sub.1 represents an alkoxy radical (C.sub.1 -C.sub.4), an alkenyloxy radical containing from 2 to 4 carbon atoms, a propargyloxy radical, a halogenoalkoxy radical (C.sub.1 -C.sub.4), an amino radical, an alkylamino radical (C.sub.1 -C.sub.4) or a dialkylamino radical in which each of the alkyl parts, which are identical or different, contains from 1 to 4 carbon atoms, R.sub.2 represents a halogen atom, an alkyl radical containing from 1 to 5 carbon atoms, an alkoxy radical (C.sub.1 -C.sub.4), an alkenyloxy radical (C.sub.3 -C.sub.4), an alkynyloxy radical (C.sub.3 -C.sub.4), an alkylthio radical (C.sub.1 -C.sub.4), a halogenoalkyl radical (C.sub.1 -C.sub.4), a halogenoalkoxy radical (C.sub.1 -C.sub.4), a halogenoalkylthio radical (C.sub.1 -C.sub.4) or the nitro, hydroxyl or cyano radical and n is an integer which can be equal to 0, 1, 2, 3, 4 or 5, it being understood that, if n is greater than or equal to 2, the substituents R.sub.2 can be identical or different.
They can be used for protecting plants against fungal diseases.

REFERENCES:
patent: 4060533 (1977-11-01), Nadelson

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