反应详情

A mixture of 436 mg (1.27 mmol) of 2-pivaloylamino-4-hydroxy-6-ethynylpyrido[2,3-d]pyrimidine, 415 mg of N-(5-bromothien-2-ylsulfonyl)glycine ethyl ester, 20 mg of palladium chloride, 54 mg of triphenylphosphine, 10 mg of cuprous iodide, and 0.4 mL of triethylamine in 7 mL of acetonitrile was heated to reflux under nitrogen for 1 hour. The resulting reaction mixture was then concentrated in vacuo and the residue flash chromatographed with 4% CH3 OH/chloroform to give 610 mg of N-[5-(2-pivaloylamino-4-hydroxypyrido[2,3-d]pyrimidin-6-ylethynyl)thien-2-ylsulfonyl]glycine ethyl ester as a tan solid. 1H NMR (300 MHz, DMSO-d6) δ1.13 (t, J=7 Hz, 3H), 1.25, (s, 9H), 3.79 (d, J=5.8 Hz, 2H), 3.99 (q, J=7 Hz, 2H), 7.48 (d, J=3.6 Hz, 1H), 7.56 (d, J=3.6 Hz, 1H), 8.51 (s, 1H), 8.65 (t, J=5.8 Hz, 1H), 8.99 (s, 1H).

1. temperaturewas heated
2. temperatureto reflux under nitrogen for 1 hour
3. customThe resulting reaction mixture
4. concentrationwas then concentrated in vacuo
5. customthe residue flash chromatographed with 4% CH3 OH/chloroform