77375-79-2Relevant academic research and scientific papers
Sulfonylureas have antifungal activity and are potent inhibitors of Candida albicans acetohydroxyacid synthase
Lee, Yu-Ting,Cui, Chang-Jun,Chow, Eve W. L.,Pue, Nason,Lonhienne, Thierry,Wang, Jian-Guo,Fraser, James A.,Guddat, Luke W.
, p. 210 - 219 (2013/02/23)
The sulfonylurea herbicides exert their activity by inhibiting plant acetohydroxyacid synthase (AHAS), the first enzyme in the branched-chain amino acid biosynthesis pathway. It has previously been shown that if the gene for AHAS is deleted in Candida albicans, attenuation of virulence is achieved, suggesting AHAS as an antifungal drug target. Herein, we have cloned, expressed, and purified C. albicans AHAS and shown that several sulfonylureas are inhibitors of this enzyme and possess antifungal activity. The most potent of these compounds is ethyl 2-(N-((4-iodo-6-methoxypyrimidin-2-yl)carbamoyl) sulfamoyl)benzoate (10c), which has a Ki value of 3.8 nM for C. albicans AHAS and an MIC90 of 0.7 μg/mL for this fungus in cell-based assays. For the sulfonylureas tested there was a strong correlation between inhibitory activity toward C. albicans AHAS and fungicidal activity, supporting the hypothesis that AHAS is the target for their inhibitory activity within the cell.
Substituted sulfonylurea, processes for the production of these compounds, as well as compositions containing the same and having herbicidal and plant growth regulating activity
-
, (2008/06/13)
New substituted sulfonyl urea are disclosed of the general formula STR1 in which R1 is chlorine, --COOR5, --S(O)n --R6 or STR2 R2 is STR3 or --CH2 --C C--R11, R3 is hydrogen, C1 -C4 -alkyl, C1 -C4 -alkylthio, halogen, halogen-C1 -C4 -alkyl, halogen-C1 -C4 -alkoxy, Di-C1 -C3 -alkyl-amino, C1 -C3 -alkyl-amino or C1 -C3 -alkoxy-C1 -C3 -alkoxy, R4 is hydrogen C1 -C4 -alkyl, C1 -C4 -alkoxy, C1 -C4 -alkylthio, halogen, halogen-C1 -C4 -alkyl, halogen-C1 -C4 -alkoxy, Di-C1 -C3 -alkyl-amino, C1 -C3 -alkyl-amino, or C1 -C3 -alkoxy-C1 -C3 -alkoxy, Z is --CH= or --N=, R5 is C1 -C8 -alkyl, C3 -C8 -cycloalkyl, C1 -C3 -alkoxy-C1 -C3 -alkyl, phenyl, substituted phenyl, benzene or substituted benzene, R6 is C1 -C6 -alkyl or phenyl, R7 is C1 -C4 -alkyl, R8 is C1 -C4 -alkyl, R7 and R8 are independently C3 -C8 -cycloalkyl, morpholinyl, pyrrolidinyl, piperidyl or piperazinyl, R9 is hydrogen, chlorine, fluorine, or C1 -C3 -alkyl, R10 is hydrogen, chlorine, fluorine, trifluoromethyl or C1 -C3 -alkyl, R11 is hydrogen, chlorine, fluorine, cyano, C1 -C4 -alkyl or phenyl, X is oxygen or sulfur, and n is 0, 1 or 2, as well as processes for the preparation of these compounds and compositions having herbicidal and plant growth regulating effectiveness.
Intermediates for herbicidal sulfonamides
-
, (2008/06/13)
This invention relates to novel o-carbonylbenzenesulfonyl isocyanates and their use as intermediates for the preparation of sulfonylureas which are known to be active herbicides.
