1-Methylimidazole → HCID 57404737, compound

Participants

Reaction Conditions

Reaction Steps

3-(4,6-Dimethoxy-1,3,5-triazin-2-yl)-7-fluoro-3-methyl-1,3-dihydro-2H-indol-2-one (0.50 g) and 1-methyl-1H-imidazole (0.37 g) are introduced as initial charge in 5 ml of dichloromethane and cooled to −20° C. With stirring, difluoromethanesulfonyl chloride (0.58 g) is added dropwise and the mixture is slowly warmed to room temperature. The mixture is stirred for 3 hours at room temperature. HPLC analysis detects starting material (67%), the desired product (25%) and further components. The mixture is added to 10 ml of water, the phases are separated and the organic phase is concentrated by evaporation in vacuo. The residue is purified by chromatography and the product is separated off from the unreacted starting material. This gives the title compound in an HPLC purity of 86% (0.16 g, 22% of theory). By means of 2D-NMR, it is possible to confirm the structure as N-sulfonylated compound.

Provenance & Evidence