1-(3-(Pyrrolidin-1-yl)propyl)-1,2,3,4-tetrahydroquinolin-6-amine → 5-methyl-N-(1-(3-(pyrrolidin-1-yl)propyl)-1,2,3,4-tetrahydroquinolin-6-yl)thiophene-2-carboximidamide

Participants

Reaction Steps

To a stirred solution of 1-(3-(pyrrolidin-1-yl)propyl)-1,2,3,4-tetrahydroquinolin-6-amine (115 mg, 0.443 mmol) in ethanol (6 ml) was added methyl 5-methylthiophene-2-carbimidothioate hydroiodide (265 mg, 0.887 mmol). The resulting suspension was stirred overnight at room temperature. The mixture was then diluted with water and sodium carbonate and extracted with dichloromethane. The combined organics were dried, filtered and concentrated, then chromatographed on silica gel with ethyl acetate, followed by 5-10% (2M NH3 in MeOH) in dichloromethane as eluent to give the desired 5-methyl-N-(1-(3-(pyrrolidin-1-yl)propyl)-1,2,3,4-tetrahydroquinolin-6-yl)thiophene-2-carboximidamide (98 mg, 0.256 mmol, 57.8% yield). 1H NMR (DMSO-d6) δ 7.45 (d, J=3.3 Hz, 1H), 6.74 (d, J=2.4 Hz, 1H), 6.53 (m, 2H), 6.45 (s, 1H), 6.13 (brs, 2H), 3.26-3.16 (m, 4H), 2.68-2.63 (m, 2H), 2.43-2.39 (m, 6H), 2.41 (s, 3H), 1.86-1.82 (m, 2H), 1.68-1.64 (m, 6H). ESI-MS (m/z, %) 383 (MH+, 39), 272 (49), 192 (100). ESI-HRMS calculated for C22H31N4S (MH+), calculated: 383.2264, observed:

Provenance & Evidence