Tert-butyl 1,4-diazepane-1-carboxylate → tert-butyl 4-(4-nitro-1-(2,2,2-trifluoroethyl)-1H-pyrazol-5-yl)-1,4-diazepane-1-carboxylate

Participants

Reaction Steps

Following the procedure for Intermediate 22 starting from 5-bromo-4-nitro-1-(2,2,2-trifluoroethyl)-1H-pyrazole and tert-butyl 1,4-diazepane-1-carboxylate gave tert-butyl 4-(4-nitro-1-(2,2,2-trifluoroethyl)-1H-pyrazol-5-yl)-1,4-diazepane-1-carboxylate as a pale yellow gum (197 mg, 91%). 1H NMR (400 MHz, CDCl3) δ 8.19-8.12 (m, 1H), 4.76-4.66 (m, 2H), 3.65-3.49 (m, 4H), 3.32-3.23 (m, 4H), 1.92-1.78 (m, 2H), 1.52-1.47 (m, 9H).

Provenance & Evidence