Propoxycarbazone-sodium

METHYL 2- 4,5-DIHYDRO-4-METHYL-5-OXO-3-PROPOXY-1 H-1,2,4-TRIAZOL-1 -YL)CARBOXAMIDOSULFONYLBENZOATE 

NOR 19 Jun 2001 The chemical is banned. It is prohibited to import, sell and use propoxycarbazone-sodium as a pesticide. 

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The compound is applied on soft and durum wheat, triticale and rye, together with the safener mefenpyr-diethyl (Fig. 2.2.2) as the straight products Atlantis OF , Silverado and Osprey or in combination with iodosulfuron-methyl-sodium ( Atlantis WG , Cossack , Padfica ), diflufenican and propoxycarbazone-sodium (Table 2.2.12). 

Table 2.6.1 Physicochemical properties of flucarbazone-sodium and propoxycarbazone-sodium.

The special biological spectrum - especially against difficult to control monoco-tyledonous weeds - and the selectivity in cereals led to development of two compounds, later known as fiucarbazone-sodium (1) and propoxycarbazone-sodium (2). 

The sulfonyl component of propoxycarbazone-sodium (2) is an integral part of several commercial sulfonylureas [21]. Technical procedures exist for sulfonyl isocyanate preparation starting from saccharin (Scheme 2.6.5) [22, 23]. 

Propoxycarbazone-sodium (2) can be applied straight or in tank mixtures with other herbicides such as triasulfiiron, metsulfiiron-methyl, chlorsulfiiron, thifensulfuron-methyl, prosulfuron, carfentrazone, dicamba, bromoxynil, dopyr-alid, MCPA amine or ester, 2,4-D amine or ester, metribuzin or fluroxypyr. Olympus flex is a ready to use formulation with mesosulfuron. 

The exchange of the ortho-COOMe by the ortho-OC i residue in the sulfonylaryl unit of propoxycarbazone sodium (103 2001, Attribut , Bayer CropScience) [194] led to the systemic herbicide flucarbazone sodium (104 2000, Everest , Bayer CropScience) [195] (Fig. 35.25) (for more details see Chapter 2.6). 

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