N-Methylisopropylamine → N-(3-chloro-4-fluorophenyl)-7-{(2E)-4-[isopropyl(methyl)amino]but-2-enoyl}-5,6,7,8-tetrahydropyrido[4',3':4,5]thieno[2,3-d]pyrimidin-4-amine

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Reaction Steps

To an ice-bath cooled solution of 4-Bromo-1-[4-(3-chloro-4-fluoro-phenylamino)-5,8-dihydro-6H-9-thia-1,3,7-triaza-fluoren-7-yl]-but-2-en-1-one (0.14 g, 0.291 mmol) in dichloromethane (4.0 ml) was added isopropylmethylamine (0.121 ml, 1.16 m mol) followed by the addition of DIEA (0.056 ml, 0.32 mmol). The resulting mixture was stirred at RT overnight. TLC (10% MeOH/Dichloromethane) indicates no starting material present. The crude mixture was rotavapped to dryness, dissolved in DMF & subjected to HPLC conditions [H2O (containing 0.1% NH4OH)-MeCN] to give the desired product (26 mg, 19%). 1H-NMR (DMSO-d6) δ 8.46 (m, 1H), 8.39 (s, 1H), 7.88 (m, 1H), 7.62 (m, 1H), 7.42 (t, 1H), 6.67 (m, 1H), 3.94 (m, 2H), 3.87 (m, 4H), 2.75 (m, 2H), 2.11 (s, 3H), 0.96 (d, 6H); LCMS RT=2.53 min, [M+H]+=474.1.

Provenance & Evidence