Hydrochloric Acid → Methyl (+/-)-13-cyclohexyl-6,7-dihydro-6-carboxy-6-methyl-5H-indolo[2,1-a][2]benzazepine-10-carboxylate

Participants

Reaction Conditions

Reaction Steps

Lithium hydroxide (12 mg, 0.5 mmol) was added to a solution of methyl (±)-13-cyclohexyl-6,7-dihydro-6-carbomethoxy-6-methyl-5H-indolo[2,1-a][2]benzazepine-10-carboxylate (20.0 mg, 0.045 mmol) in methanol (1.0 mL) and tetrahydrofuran (1.0 mL) in a microwave vial. The vial was sealed and the contents heated at 65° C. for 50 min in a microwave apparatus. The solution was acidified with dilute hydrochloric acid to precipitate the crude acid. The solid was collected and was purified on the Shimadzu preparative liquid chromatograph. The product containing fraction was concentrated on a Speed Vac® to leave the titled compound as a white solid (6.5 mg, 34%). ESI-MS m/z 432 (MH+) 1H NMR (500 MHz, CHLOROFORM-D) δ ppm 1.18-1.51 (m, 6 H) 1.62-1.83 (m, 3 H) 1.89-2.14 (m, 4 H) 2.36 (d, J=13.73 Hz, 0.5 H) 2.72 (d, J=13.43 Hz, 0.5 H) 2.89-2.98 (m, 1 H) 3.01 (d, J=13.73 Hz, 0.5 H) 3.19 (d, J=14.04 Hz, 0.5 H) 3.32 (d, J=14.65 Hz, 0.5 H) 3.90 (d, J=14.60 Hz, 0.5 H) 3.94 (d, J=17.70 Hz, 3 H) 4.31 (d, J=14.65 Hz, 0.5 H) 4.89 (d, J=14.65 Hz, 0.5 H) 7.30-7.50 (m, 4 H) 7.75 (dd, J=23.04, 8.39 Hz, 1H) 7.86 (dd, J=24.87, 8.39 Hz, 1 H) 8.11 (s, 0.5 H) 8.28 (s, 0.5 H).

Provenance & Evidence