Ethyl orthoformate → HCID 21880589, compound

Participants

Reaction Steps

A solution of 4-amino-1-(2-chlorophenyl)-5-(4-chlorophenyl)-1H-pyrazole-3-carboxylic acid morpholin-4-ylamide (1-10A-1a, 200 mg, 0.46 mmol) and triethylorthoformate (116 microliters, 0.7 mmol) in toluene (2.5 ml) was heated at 100° C. for 0.45 h and at 120° C. for 2 h. The reaction mixture was cooled to room temperature, diluted with H2O, and extracted with EtOAc (2×). The combined organic extracts were washed with 1 M K2CO3 and saturated aqueous brine, dried, and concentrated under vacuum. The crude residue was purified via radial chromatography (1 mm plates, 50% EtOAc/hexanes as eluant) to give the desired product 10A-1 as an amorphous solid: MS 442.1 (M+1)+; 1H NMR (400 MHz, CDCl3) δ 7.99 (s, 1H), 7.53-7.50 (m, 1H), 7.47-7.39 (m, 3H), 7.35-7.28 (m, 4H), 4.25 (bm, 2H), 3.95 (bm, 2H), 3.75 (bm, 2H), 3.00 (bm, 2H).

Provenance & Evidence