Triethylamine → 1-[7-(2-Chlorophenyl)-8-iodo-2-methylpyrazolo[1,5-a][1,3,5]triazin-4-yl]-4-ethylaminopiperidine-4-carboxylic Acid Amide

Participants

Reaction Steps

To a solution of 4-chloro-7-(2-chlorophenyl)-8-iodo-2-methylpyrazolo[1,5-a][1,3,5]triazine (I-1A-1e; 28 mg, 0.069 mmol) and triethylamine (14 μl, 0.10 mmol) in tetrahydrofuran (1 ml) was added 4-ethylaminopiperidine-4-carboxylic acid amide (I-1A-1h; 13 mg, 0.076 mmol) and the mixture was stirred overnight. The mixture was extracted from water with ethyl acetate, the combined organic layers were washed with brine, dried (MgSO4), filtered through a 0.45 μm filter disk, and then concentrated, in vacuo, to afford the crude product (50 mg). Purification on a Chromatotron using 0-20-30% acetonitrile in methylene chloride as eluant afforded product I-1A-1i (20 mg, 54%): +APcI MS (M+1) 540.8; 1H NMR (400 MHz, CD2Cl2) δ 7.54 (d, J=7.9 Hz, 1H), 7.47-7.38 (m, 3H), 4.83-4.65 (br m, 2H), 4.20-4.05 (br m, 2H), 2.55 (q, J=7.1 Hz, 2H), 2.50 (s, 3H), 2.26-1.98 (m, 2H), 1.78-1.75 (m, 2H), 1.10 (t, J=7.1 Hz, 3H).

Provenance & Evidence