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 Novel phosphorus compounds for protecting cultivated plants from the phytotoxic action of herbicides

Details
Inventors: Diel, Peter J.; Maier, Ludwig;
Assignee: Ciba-Geigy Corporation (Ardsley, NY)
Primary Examiner: Hollrah; Glennon H.
Assistant Examiner: Morris; Patricia L.
Attorney, Agent or Firm: Roberts; Edward McC.

Novel acylated hydrazinomethylphosphonic acids, hydrazinomethylphosphonates, hydrazinomethylphosphinic acids, hydrazinomethylphosphinates or hydrazinomethylphosphine oxides of formula I below are able as "antidotes" or "safeners" to protect cultivated plants from the phytotoxic action of herbicides. Suitable crops are preferably maize, sorghum, cereals, rice and soybeans and the herbicides employed are in particular chloroacetanilides. The acylated hydrazinomethylphosphonates, hydrazinomethylphosphinates or hydrazinomethylphosphine oxides have the formula I ##STR1## wherein R.sub.1 and R.sub.2 are each independently hydroxy, alkyl, aryl, phenylalkyl, alkoxy, alkenyloxy, alkynyloxy, aryl or phenylalkoxy, the radicals of which may be substituted, R.sub.3 is a halogenated alkanoyl or alkenoyl radical R.sub.4 is hydrogen, a halogenated alkanoyl or alkenoyl radical or an alkyl, alkenyl or phenylalkyl radical, or an alkylcarbonyl, alkenylcarbonyl, alkynylcarbonyl or phenylcarbonyl radical which may be unsubstituted or substituted or is an alkoxycarbonyl or phenylalkoxycarbonyl radical which may also be unsubstituted or substituted or is an alkoxycarbonyl or phenylakoxycarbonyl radical which may also be substituted, R.sub.5 is hydrogen or an alkyl, alkenyl or alkynyl radical which may also be substituted, R.sub.9 is hydrogen, alkyl or phenyl which is unsubstituted or substituted and R.sub.10 is hydrogen or alkyl.

DETAILED DESCRIPTION What is claimed is: 1.
A composition for protecting a cultivated plant of cereal, maize, rice or sorghum from the phytotoxic action of a haloacetanilide herbicide, containing an inert carrier and an effective safening amount of a compound of the formula ##STR19## wherein R.
sub.
1 and R.
sub.
2 are each independently hydroxy, C.
sub.
1 -C.
sub.
4 alkyl, phenyl, naphthyl, C.
sub.
1 -C.
sub.
4 alkoxy, C.
sub.
2 -C.
sub.
4 alkenyloxy, C.
sub.
2 -C.
sub.
4 alkynyloxy, C.
sub.
2 -C.
sub.
4 haloalkoxy containing 1 to 5 halogen atoms, C.
sub.
2 -C.
sub.
8 alkoxyalkoxy, C.
sub.
1 -C.
sub.
4 cyanoalkoxy, phenyl-C.
sub.
1 -C.
sub.
4 -alkyl, halophenyl-C.
sub.
1 -C.
sub.
4 -alkyl, cyanophenyl-C.
sub.
1 -C.
sub.
4 -alkyl, nitrophenyl-C.
sub.
1 -C.
sub.
4 -alkyl, C.
sub.
1 -C.
sub.
4 -alkylphenyl-C.
sub.
1 -C.
sub.
4 -alkyl, phenyl-C.
sub.
1 -C.
sub.
4 -alkoxy, halophenyl-C.
sub.
1 -C.
sub.
4 -alkoxy, cyanophenyl-C.
sub.
1 -C.
sub.
4 -alkoxy, nitrophenyl-C.
sub.
1 -C.
sub.
4 -alkoxy, C.
sub.
1 -C.
sub.
4 -alkylphenyl-C.
sub.
1 -C.
sub.
4 -alkoxy, naphthyl-C.
sub.
1 -C.
sub.
4 -alkoxy, halonaphthyl-C.
sub.
1 -C.
sub.
4 -alkoxy, cyanonaphthyl-C.
sub.
1 -C.
sub.
4 -alkoxy, nitronaphthyl-C.
sub.
1 -C.
sub.
4 -alkoxy or C.
sub.
1 -C.
sub.
4 -alkylnaphthyl-C.
sub.
1 -C.
sub.
4 -alkoxy, R.
sub.
3 is --COCX.
sub.
1 X.
sub.
2 --R.
sub.
6 or an alkenoyl radical which is substituted by 1 to 3 halogen atoms and contains 2 to 4 carbon atoms in the alkenyl moiety, R.
sub.
4 is hydrogen or a substituent as defined for R.
sub.
3, or is a --COOR.
sub.
7 or --COR.
sub.
8 radical or a C.
sub.
1 -C.
sub.
4 alkyl or C.
sub.
2 -C.
sub.
4 alkenyl radical, or is a phenyl-C.
sub.
1 -C.
sub.
4 -alkyl radical which is unsubstituted or substituted in the phenyl ring by halogen, cyano, nitro or C.
sub.
1 -C.
sub.
4 alkoxy, R.
sub.
5 is hydrogen or a C.
sub.
1 -C.
sub.
4 alkyl, C.
sub.
2 -C.
sub.
4 alkenyl or C.
sub.
2 -C.
sub.
4 alkynyl radical, R.
sub.
6 is hydrogen, halogen or a C.
sub.
1 -C.
sub.
6 alkyl radical, R.
sub.
7 is a C.
sub.
1 -C.
sub.
4 alkyl radical or a phenyl-C.
sub.
1 -C.
sub.
4 -alkyl radical which is unsubstituted or substituted in the phenyl ring by halogen, cyano, nitro or C



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