N,N-dimethyl-3-[6-(methyloxy)-7-nitro-3,4-dihydro-2(1H)-isoquinolinyl]-3-oxo-1-propanamine → 2-[3-(Dimethylamino)propanoyl]-6-(methyloxy)-1,2,3,4-tetrahydro-7-isoquinolinamine

Participants

Reaction Steps

A solution of N,N-dimethyl-3-[6-(methyloxy)-7-nitro-3,4-dihydro-2(1H)-isoquinolinyl]-3-oxo-1-propanamine (0.65 g, 2.1 mmol) in ethanol (10 mL) was treated with 10% palladium on carbon (70 mg, Aldrich), and stirred under 60 psi of hydrogen pressure for 16 h in a Fischer-Porter apparatus. The pressure was released, the reaction vessel evacuated, and back-filled with nitrogen twice. The mixture was filtered through celite and the filtrate was concentrated to provide 2-[3-(dimethylamino)propanoyl]-6-(methyloxy)-1,2,3,4-tetrahydro-7-isoquinolinamine (0.58 g, 2.1 mmol, 99%). 1H NMR (400 MHz, DMSO-d6) is complicated due to amide rotomers d ppm 2.14 (s, 6 H), 2.46-2.52 (m, signals beneath DMSO, 4 H), 2.55-2.73 (m, two triplets at 2.58 and 2.69, 2 H), 3.58-3.63 (m, 2 H), 3.72 (s, 3 H), 4.37-4.48 (two singlets at 4.38 and 4.45, 2 H), 4.54-4.61 (two broad singlets at 4.55 and 4.58, 2 H), 6.38-6.42 (two singlets at 6.39 and 6.41, 1 H), 6.56-6.59 (two singlets at 6.56 and 6.57, 1 H); ESIMS (M+H)+=278.

Provenance & Evidence