Diisopropylethylamine → HCID 70896232, compound

Participants

Reaction Steps

A mixture of lithium (S)-1-(2-(quinuclidin-3-ylamino)ethyl)-1H-benzo[d]imidazole-7-carboxylate (0.2 g, 0.7 mmol) from Step G above, N,N-diisopropylethylamine (0.7 mL, 4.1 mmol), and 1-propanephosphonic acid cyclic anhydride (T3P) (2.1 mL, 3.4 mmol) in N,N-dimethylformamide (10 mL) was stirred at room temperature for 7 h. The crude reaction was concentrated under reduced pressure and then purified by SCX column and preparative thin layer chromatography (90:9:1 methylene chloride/methanol/ammonium hydroxide) to afford 6-((S)-quinuclidin-3-yl)-5,6-dihydroimidazo[4,5,1-jk][1,4]benzodiazepin-7(4H)-one: 1H NMR (500 MHz, DMSO-d6) δ 8.32 (s, 1H), 7.91 (d, J=8.0 Hz, 1H), 7.86 (dd, J=8.0, 1.0 Hz, 1H), 7.32 (t, J=8.0 Hz, 1H), 4.85-4.50 (m, 2H), 4.48-4.39 (m, 2H), 3.91-3.33 (m, 1H), 3.31-3.11 (m, 1H), 3.08-3.02 (m, 1H), 2.99-2.89 (m, 1H), 2.81-2.71 (m, 3H), 1.97-1.95 (m, 1H), 1.71-1.56 (m, 3H), 1.49-1.39 (m, 1H).

Provenance & Evidence