2-Phenyl-5,6-dihydro-4-pyrone derivatives and herbicidal composi

Details 2-Phenyl-5,6-dihydro-4-pyrone derivatives and herbicidal composi 2-Phenyl-5,6-dihydro-4-pyrone derivatives and herbicidal composi

1979-02-27

1982-02-23

Mills, Catherine L.

Chemistry: fertilizers

Processes and products

Forms or conditioning

2603458R, 2603452, A01N 4316, C07D30928, C07D31174, C07D31194

Patent

active

043167373

ABSTRACT:
New 2-phenyl-5,6-dihydro-4-pyrone derivatives and herbicidal compositions in which they are present.
They correspond to the general formula: ##STR1## in which: R.sub.1 and R.sub.2, which are identical or different, represent a hydrogen atom or an alkyl radical (C.sub.1 -C.sub.4), or together form an alkylene chain (C.sub.2 -C.sub.6), R.sub.3 represents an alkyl radical (C.sub.1 -C.sub.4), an alkenyl radical (C.sub.2 -C.sub.4), an alkynyl radical (C.sub.2 -C.sub.4), a halogenoalkyl radical (C.sub.1 -C.sub.4) or an alkoxyalkyl radical (C.sub.3 -C.sub.5), Y represents a halogen atom, an alkyl radical (C.sub.1 -C.sub.4) or an alkoxy radical (C.sub.1 -C.sub.4), and n represents an integer which can be equal to 1, 2 or 3, with the proviso that, when n is equal to 2 or 3, the radicals Y can be identical or different.
These compounds can be used for selectively destroying weeds in crops such as sunflower, cotton, soft wheat, rice, soya bean, groundnut, bean and tomato plant.

REFERENCES:
patent: 3493586 (1970-02-01), Kuhn et al.
patent: 3989737 (1976-11-01), Sawaki et al.
Gelin et al., Bull. Soc. Chim. de France, (1968), No. 1, pp. 288-298.

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