Diisopropylethylamine → N-(3-(2-((2-methoxy-4-(1-methylpiperidin-4-yl)phenyl)amino)-5-methyl-7-oxopyrido[2,3-d]pyrimidin-8(7H)-yl)phenyl)acrylamide

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a suspension of 2-methoxy-4-(1-methylpiperidin-4-yl)aniline (19b, 363 mg, 1.65 mmol) and N-(3-(5-methyl-2-(methylsulfinyl)-7-oxopyrido[2,3-d]pyrimidin-8(7H)-yl)phenyl)acrylamide (5b, 300 mg, 0.81 mmol) in tert-butanol (15 mL) at RT was added diisopropylethylamine (0.43 mL, 2.443 mmol). The mixture was heated at 100° C. for 48 h. The reaction mixture was concentrated on the rotovap and the crude residue was suspended in Et2O and filtered. The resulting light yellow amorphous solid was washed with Et2O (3×50 mL) and chromatographed on an ISCO Combiflash RF (40 g Thomson SingleStep column, using a gradient of 0-15% MeOH in DCM) affording enriched product. It was repurifed on a Gilson (Gemini Phenomenex; 30×150 mm, 5 u, 10-95% 0.1% TFA/CH3CN in 0.1% TFA/water), concentrated in the genevac overnight and then passed through a Silicycle SPE-R66030B-20× SiliaSep OT, 5 g/25 mL carbonate column using 20% MeOH/DCM to remove any residual salt then dried under vacuum affording N-(3-(2-((2-methoxy-4-(1-methylpiperidin-4-yl)phenyl)amino)-5-methyl-7-oxopyrido[2,3-d]pyrimidin-8(7H)-yl)phenyl)acrylamide (22 mg) as a light yellow solid. m/z (ESI, +ve ion) 525.0 (M+H)+. 1H NMR (400 MHz, DMSO6) δ ppm 10.34 (1H, s), 8.85 (1H, s), 8.16 (1H, s), 7.85 (1H, d, J=9.2 Hz), 7.63 (1H, s), 7.48-7.56 (1H, m), 7.36 (1H, d, J=8.4 Hz), 7.00 (1H, d, J=7.8 Hz), 6.80 (1H, d, J=1.4 Hz), 6.38-6.47 (1H, In), 6.30-6.38 (2H, m), 6.19-6.29 (1H, m), 5.70-5.78 (1H, m), 3.80 (3H, s), 2.84 (2H, d, J=11.2 Hz), 2.47 (3H, s), 2.25-2.36 (1H, m), 2.19 (3H, s), 1.92 (2H, td, J=11.1, 3.7 Hz), 1.52-1.69 (4H, m).

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