New 3-ureido-(thio)-chromone derivatives

Details New 3-ureido-(thio)-chromone derivatives New 3-ureido-(thio)-chromone derivatives

1978-12-07

1981-03-31

Randolph, John D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

71 81, 71 91, 2603452, 548218, C07D31122, C07D33506

Patent

active

042595061

ABSTRACT:
They correspond to the formula: ##STR1## in which: X is an oxygen or sulphur atom, Y is a hydrogen atom or an alkyl radical (C.sub.1 -C.sub.4), Z is a halogen atom or an alkyl (C.sub.1 -C.sub.6), cycloalkyl (C.sub.5 -C.sub.7), alkoxy (C.sub.1 -C.sub.4) or phenyl radical, n is a number equal to 0, 1, 2 or 3, R.sub.1 is a hydrogen atom or an alkyl radical (C.sub.1 -C.sub.4) and R.sub.2 and R.sub.3, which are identical or different, each represent a hydrogen atom or an alkyl (C.sub.1 -C.sub.6), alkenyl (C.sub.2 -C.sub.4) or alkynyl (C.sub.2 -C.sub.4) radical, or together form a heterocyclic ring possessing from 5 to 6 ring members and optionally containing, in addition to the nitrogen atom, an oxygen or sulphur atom as a hetero-atom.
These compounds can be used for selectively destroying weeds in crops such as maize, soya, cotton, sunflower, rice and horse bean.

REFERENCES:
patent: 2624664 (1953-01-01), Mowry et al.
patent: 3856501 (1974-12-01), Zech et al.
Eisert et al., Chem. Ber., vol. 109, pp. 3462 to 3472, (1976).
Sarda et al., Chem. Abstracts, vol. 86, abst. No. 5270y, (1977).

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