Ethyl 3-(2-amino-3,5-bis(trifluoromethyl)phenylamino)-3-oxopropanoate → ethyl 2-(5,7-bis(trifluoromethyl)-1H-benzo[d]imidazol-2-yl)acetate

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Reaction Steps

A solution of ethyl 3-(2-amino-3,5-bis(trifluoromethyl)phenylamino)-3-oxopropanoate (330 mg, 0.92 mmol) in 3:1 acetic acid/THF (4 mL) was heated at reflux for 18 h. The mixture was concentrated in-vacuo, and the residue was purified over silica gel, eluting with 20%-30%-40% EtOAc/heptane, to yield 256 mg of a colorless oil as product. 1H NMR (500 MHz, DMSO) δ ppm 1.20 (m, 3 H) 4.11 (m, 4 H) 7.82 (m, 1 H) 8.28 (m, 1 H) 13.37 (m, 1 H).

Provenance & Evidence