Hydrochloric Acid → HCID 66833601, compound

Participants

Reaction Steps

A solution of tert-butyl 2-(tert-butoxycarbonyl(methyl)amino)-2-(3-(pyrrolidin-1-yl)propyl)-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)hexanoate (183 mg, 0.33 mmol) in 6 N hydrochloric acid (5 mL) was stirred at 95° C. overnight. After cooling to room temperature, the reaction mixture was transferred to a separatory funnel, diluted with deionized water (5 mL) and washed with dichloromethane (3×). The aqueous layer was frozen in liquid nitrogen and lyophilized to give 6-borono-2-(methylamino)-2-(3-(pyrrolidin-1-yl)propyl)hexanoic acid dihydrochloride, as a colorless foam (81 mg, 80%). 1H NMR (D2O, 300 MHz) δ 3.55-3.45 (m, 2H), 3.14-3.05 (m, 2H), 2.98-2.87 (m, 2H), 2.53 (s, 3H), 2.03-1.92 (m, 2H), 1.92-1.76 (m, 6H), 1.76-1.64 (m, 1H), 1.62-1.48 (m, 1H), 1.36-1.14 (m, 3H), 1.14-0.98 (m, 1H), 0.64 (t, J=7.2 Hz, 2H). ESI MS found for C14H29BN2O4 m/z [301.2 (M+1)].

Provenance & Evidence