Potassium Phosphate, Tribasic → 2-(2-Chloro-5-cyanopyridin-4-ylamino)-N-methylbenzamide

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A mixture of 6-chloro-4-iodo-nicotinonitrile (14 g, 53.03 mmole, 1 eq), 2-amino-N-methoxy-benzamide (7.96 g, 53.03 mmole, 1 eq) and K3PO4 (28.14 g, 132.57 mmole, 2.5 eq) in 1,4-dioxane (250 mL) was degassed with N2 for 1 h. To this mixture were added Pd(OAC)2 (0.238 g, 1.06 mmole, 0.02 eq) and DPEPhos (2.28 g, 4.24 mmole, 0.08 eq). The resulting reaction mixture was degassed with N2 for another 15 min after which the resulting reaction mixture was stirred at 110° C. overnight. After completion of reaction solid material was collected by filtration, dissolved in water (500 mL), and extracted with ethyl acetate (5×200 mL). Combined organic layers were dried over sodium sulfate, filtered and concentrated under reduced pressure to give crude material. It was purified by column chromatography over silica gel (60-120 mesh) using 0.2% methanolic ammonia (10% ammonia in MeOH) in dichloromethane as the eluant to give the title compound as a pale yellow solid (9 g, 59%). 1H-NMR (400 MHz, DMSO-d6): δ 2.75 (d, 3H, J=4.56 Hz), 7.09 (s, 1H), 7.25-7.35 (m, 1H), 7.53-7.60 (m, 2H), 7.72 (d, 1H, J=7.48 Hz), 8.56 (s, 1H), 8.69-8.79 (brs, 1H), 10.65 (s, 1H). LC-MS calculated for C14H11ClN4O (M+H) 287.06, found 286.9.

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