Flazasulfuron

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Flazasulfuron
Names
Preferred IUPAC name
N-[(4,6-Dimethoxypyrimidin-2-yl)carbamoyl]-3-(trifluoromethyl)pyridine-2-sulfonamide
Other names
Katana, Shibagen [1]
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.123.655 Edit this at Wikidata
UNII
  • InChI=1S/C13H12F3N5O5S/c1-25-8-6-9(26-2)19-11(18-8)20-12(22)21-27(23,24)10-7(13(14,15)16)4-3-5-17-10/h3-6H,1-2H3,(H2,18,19,20,21,22)
    Key: HWATZEJQIXKWQS-UHFFFAOYSA-N
  • InChI=1/C13H12F3N5O5S/c1-25-8-6-9(26-2)19-11(18-8)20-12(22)21-27(23,24)10-7(13(14,15)16)4-3-5-17-10/h3-6H,1-2H3,(H2,18,19,20,21,22)
    Key: HWATZEJQIXKWQS-UHFFFAOYAQ
  • COc1cc(nc(n1)NC(=O)NS(=O)(=O)c2c(cccn2)C(F)(F)F)OC
Properties
C13H12F3N5O5S
Molar mass 407.32 g·mol−1
Appearance White solid
Melting point 166–170 °C (331–338 °F; 439–443 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Flazasulfuron is a sulfonylurea herbicide used for controlling the unwanted growth of grass, broad-leaved weeds and sedges. The mode of action of flazasulfuron is through the inhibition of the enzyme acetolactate synthase (ALS), which results in the inhibition of amino acid synthesis, cell division and ultimately plant growth. Flazasulfuron can be used on both pre-emergent weeds and post-emergent weeds. Growth ceases within hours of the application of the compound. Symptoms include leaf discolouration, desiccation, necrosis and ultimately plant death within 20 – 25 days of application. It is a white, water-soluble solid.[2]

Flazasulfuron's HRAC classification is Group B (global, Aus), Group 2 (numeric), as it inhibits acetohydroxyacid synthase.[3]

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