Ammonia → 2-(2,6-Dimethoxypyridin-4-yl)-2H-pyrido[2,3-e][1,2,4]thiadiazin-3(4H)-one 1,1-dioxide

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Reaction Steps

The title compound (2.6 g, 7.73 mmol) was prepared in three steps from 2-chloropyridine-3-sulfonyl chloride (8.24 g, 38.9 mmol) and 2,6-dimethoxypyridin-4-amine (6.0 g, 38.9 mmol) in pyridine (25 mL) at rt; followed by ammonia in an autoclave at 100° C. for 16 h; followed by 1,1′-carbonyldiimidazole (6.2 g, 38.2 mmol) in 1,2-dichloroethane (100 mL) at 90° C. for 16 h using the methods of (IntF1), steps 1 and 2, and (IntA14), step 3.

Provenance & Evidence