HCID 19017715, compound → HCID 178448917, compound

Participants

Reaction Steps

5-Butylimino-4,5-dihydro-4-ethoxycarbonyl-4-[[2'-(N-triphenylmethyl-1H-tetrazol-5-yl)biphenyl-4-yl]methyl]thiazole, the compound resulting from Example 2A (B), (170 mg, 0.241 mmol) in 15:15:1 (v/v/v) acetic acid/tetrahydrofuran/water (4 mL) was heated at reflux for 90 minutes. The solvent was evaporated under reduced pressure, and toluene was added and evaporated. Chromatography of the residue on silica gel eluting with 2-6% methanol in chloroform afforded 33.6 mg (30%) of the desired product as a yellow foam solid. TLC (10% methanol/90% chloroform) Rf =0.33. 1H NMR (CDCl3, 300 MHz) d 0.88 (t, 3H), 1.23 (t, 3H), 1.10-1.65 (envelope, 4H), 3.61 (d, 1H), 3.75 (dt, 2H), 3.81 (d, 1H), 4.08-4.32 (m, 2H), 7.08 (d, 2H), 7.27 (d, 2H), 7.38 (dd, 1 H), 7.50-7.63 (m, 2H), 7.75 (s, 1H), 8.20 (dd, 1H). MS (DCl/NH3) m/e 463 (M+H)+. Anal calcd for C24H26N6O2S.0.25 H2O: C, 61.72; H, 5.72; N, 17.99. Found: C, 61.89; H, 5.32; N, 17.76.

Provenance & Evidence