m-Chloroperbenzoic acid → N-(3-(2-(methylsulfinyl)-7-oxopyrido[2,3-d]pyrimidin-8(7H)-yl)phenyl)acrylamide

Participants

Reaction Conditions

Reaction Steps

At 0° C., to a suspension of N-(3-(2-(methylthio)-7-oxopyrido[2,3-d]pyrimidin-8(7H)-yl)phenyl)acrylamide (11a) (450 mg, 1.33 mmol) in 25 mL of DCM was added MCPBA (319 mg of 77% max. from Aldrich, 1.42 mmol). After the reaction mixture was stirred at 0° C. for 35 min, it was diluted with 100 mL of DCM, washed with 20 mL of ice cold sat Na2CO3 solution. The DCM layer was dried over Na2SO4 and concentrated to give N-(3-(2-(methylsulfinyl)-7-oxopyrido[2,3-d]pyrimidin-8(7H)-yl)phenyl)acrylamide (11b) (398 mg, 84% yield) as an off white crystalline solid. The crude material was used in next step without further purification. m/z (ESI, +ve ion) 355.0 (M+H)+. 1H NMR (400 MHz, DMSO-d6) 6 ppm 10.36 (1H, s), 9.30 (1H, s), 8.20 (1H, d, J=9.6 Hz), 7.76 (1H, m), 7.69 (1H, m), 7.51 (1H, t, J=8.0 Hz), 7.06 (1H, d, J=7.6 Hz), 6.94 (1H, m), 6.45 (1H, dd, J=16.9, 10.1 Hz), 6.26 (1H, d, J=16.8 Hz), 5.79 (1H, m), 2.72 (3H, s)

Provenance & Evidence