Ethanol → HCID 22257800, compound

Participants

Reaction Steps

Platinum oxide (12 mg) was added to a solution of 3,3-dimethyl-1-[2-(5-(3-pyridyl)pent-4-enoyl) pyrrolidinyl]pentane-1,2-dione (300 mg; 0.84 mmol) in methanol. (8 ml). The mixture was hydrogenated at 1 atm. for 2.5 hours. TLC indicated that the reaction was complete, and it was filtered through Celite and concentrated. Eluting through a plug of silica gel (ethyl acetate) furnished analytically pure material, 260 mg (87%). 1H NMR (CDCl3, 400 MHz): δ 0.87 (t, 3H, J=7.5); 1.21 (s, 6H); 1.64 (m, 4H); 1.69 (m, 2H); 1.78 (m, 1H); 1.96 (m, 2H); 2.15 (m, 1H); 2.53 (m, 1H); 2.63 (m, 2H); 3.49 (m, 1H); 3.53 (m, 1H); 4.57 (dd, 1H, J=8.8, 4.8); 7.20 (m, 1H); 7.49 (m, 1H, J=7.8); 8.44 (m, 2H). Anal. Calcd. for C21H30N2O3: C, 70.36; H, 8.44; N, 7.81. Found: C, 70.15; H, 8.54; N, 7.76. TLC: R1=0.80 (ethyl acetate:ethanol 4:1). Note: this final hydrogenation step may be done using 10% Pd/C, and hydrogenating for 5 hours at 60 psi. Ethanol or ethyl acetate may be used instead of methanol.

Provenance & Evidence