Hydrochloric Acid → 3-((8-((2,3-Dihydrobenzo[b][1,4]dioxin-2-yl)methyl)-4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoic acid

Participants

Reaction Steps

To tert-butyl 3-((8-((2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methyl)-4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate (0.17 g, 0.3 mmol) was added 4M solution of HCl in dioxane (3 mL). After stirring at room temperature for 4 hours, the reaction mixture was concentrated in vacuo and lyophilized in acetonitrile/water (1:1) to obtain the title compound as a hydrochloride salt (0.16 g, 99%); 1H NMR (DMSO-d6): δ 1.96 (d, 2H, J=14 Hz), 2.91-3.02 (m, 2H), 3.45-3.71 (m, 6H), 4.03-4.08 (m, 1H), 4.36 (d, 1H, J=9.2 Hz), 4.61-4.66 (m, 4H), 4.92 (br, 1H), 6.81-6.97 (m, 5H), 7.04 (d, 2H, J=8 Hz), 7.24 (t, 2H, J=8.4 Hz), 7.49-7.59 (m, 2H), 8.89 (d, 2H, J=8.8 Hz), 10.83 (br, 1H), 13.04 (br, 1H); MS for C30H31N3O5 m/z 513.99 (M+H)+.

Provenance & Evidence