Dihydropyrones, novel starting products used therein, compositio

Details Dihydropyrones, novel starting products used therein, compositio Dihydropyrones, novel starting products used therein, compositio

1982-05-24

1984-07-17

Chan, Nicky

Chemistry: fertilizers

Processes and products

Forms or conditioning

549396, 549402, 549420, 560 9, 560 11, 560 12, 560 13, 560 18, 560 21, 560 43, 560 45, 260465D, A01N 4316, C07D30932

Patent

active

044604009

ABSTRACT:
There are described novel dihydropyrones of the formula I ##STR1## wherein R.sub.1 and R.sub.2 independently of one another are each a C.sub.1 -C.sub.4 -alkyl group, or one of the two substituents is also hydrogen, or R.sub.1 and R.sub.2 jointly form a C.sub.2 -C.sub.6 -alkylene bridge, R.sub.3 is C.sub.1 -C.sub.4 -alkoxy, C.sub.2 -C.sub.6 -alkenyloxy, C.sub.2 -C.sub.4 -alkynyloxy, C.sub.1 -C.sub.4 -haloalkoxy, C.sub.3 -C.sub.5 -alkoxyalkoxy or hydroxyl, and X, Y and Z independently of one another are each hydrogen, halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -haloalkoxy, --S(O).sub.n -C.sub.1 -C.sub.4 -alkyl, --S(O).sub.n -C.sub.1 -C.sub.4 -haloalkyl, where n is 0, 1 or 2, or they are each C(O)OR.sub.4, where R.sub.4 is hydrogen or C.sub.1 -C.sub.4 -alkyl, or they are each NO.sub.2, CN or NR.sub.5 R.sub.6, where R.sub.5 and R.sub.6 independently of one another are each hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkylcarbonyl, C.sub. 1 -C.sub.4 -haloalkylcarbonyl or C.sub.1 -C.sub.4 -haloalkylsulfonyl, processes for producing them, novel starting products used therein, and the use of the novel dihydropyrones. The active substances of the formula I can be used in the form of agriculturally applicable compositions for combating weeds.

REFERENCES:
patent: 4297367 (1981-10-01), Guigues et al.
patent: 4316737 (1982-02-01), Guigues et al.

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