Sodium bis(trimethylsilyl)amide → 6-(2,4,6-Trifluorophenyl)pyrido[2,3-c]pyridazine-5,7(6H,8H)-dione

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Reaction Conditions

Reaction Steps

The product from Step 2 (2.0 g) was dissolved in dry THF (50 ml), and sodium bis-trimethylsilylamide (17.7 ml of a 11.0M solution in THF) was added dropwise with stirring under nitrogen at 0° C. The reaction was stirred for 3 hours at 0° C. and a yellow precipitate was formed. The reaction was quenched with concentrated hydrochloric acid and then poured into ice water. The solid was filtered, washed with water and air dried to give 6-(2,4,6-trifluorophenyl)-8H-pyrido[2,3-c]pyridazine-5,7-dione as a yellow solid (1.9 2 g), m.p. >330° C., still containing some THF, which was used without further purification.

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