HCID 19863329, compound → HCID 19863331, compound

Participants

Reaction Steps

To a suspension of 680 mg of 7-trimethylstannyl-2H-pyrido[3,2-b]-1,4-oxazin-3(4H)-one (0.0022 mole) in 10 ml of THF is added 2.4 ml of LiN(TMS)2 (0.0024 mole) in THF. The homogenous solution is maintained under nitrogen at room temperature for 20 min , 300 mg (0.0024 mole) of dimethylsulfate sulfate is added and the reaction mixture allowed to stir overnight. The reaction mixture is then quenched with 10 ml of sat. ammonium chloride and extracted with 3×50 ml ethyl acetate. The ethyl acetate is then washed with 3×10 ml sat. ammonium chloride, dried over sodium sulfate and concentrated to obtain off white product whish is used directly in the next step.

Provenance & Evidence