Halosulfuron methyl

Fig. 35.24. Halogen-containing pyrimidinylsulfonyl herbicides halosulfuron-methyl (101) and imazosulfuron (102).

Both systemic herbicides halosulfuron-methyl (101 maize, 18-35 g-a.i. ha ) [192] and imazosulfuron (102 paddy rice, 75-95 g-a.i. ha ) [193] demonstrate the structural variability of ring A, e.g., by incorporation of further halogenated heterocyclic systems such as 3-Cl,4-COOMe-l-CH3-lH-pyrazol-5-yl (101) and 2-chloroimidazo[l,2-a]pyridine-3-yl (102) (Fig. 35.24). 

Test dependent product = flumetsulam, halosulfuron, imazethapyr, primisulfuron-methyl, or prosulfuron. 

Pyrazole (3 chloro,4 carboxy,1 methyl 5 sulfonamide) halosulfuron Pyrazole (1.4 dimethyl,2 chloro, 3 formyl) fenpyroximate Pyrazole (2 methyl, 3 amino, 4 carboxy) pyrazosulfuron Pyrazole (2 methyl,4 carboxy, ethyl ester) pyrazosulfuron Pyrazole (1 methyl,2 ethyl,4 chloro 5 carboxy) tebufenpyrad 5 Pyrazolone (1.3 dimethyl) benzofenap, pyrazolinate, pyrazoxyfen Pyridazine (1 phenyl 3 hydroxy, 6 oxo) pyridafenthion... 

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