Trifluoroacetic acid → HCID 23433566, compound

Participants

Reaction Steps

In a oven dried 250 mL r.b. flask equivuipped with a magnetic stir bar and a N2 gas inlet was dissolved (R/S)-1-t-butoxycarbonyl-4-ethyl-1,2,3,4-tetrahydro-7-methoxyquinoline (34.0 mg, 117 μmol) in dry CH2Cl2 (1 mL). To the stirred solution was added TFA (1.2 mL) at rt and was allowed to react for 2 h. The dark red solution was quenched with sat NaHCO3 solution (10 mL), extracted with CH2Cl2 (3×25 mL), washed with brine (50 mL), dried (Na2SO4) and concentrated in vacuo to afford 21 mg (95%) of the desired amine as a clear light yellow oil. Data for (R/S)-4-ethyl-1,2,3,4-tetrahydro-7-methoxyquinoline: Rf=0.1 (hexanes/EtOAc, 3:1); 1H NMR (400 MHz, CDCl3) 6.92 (d, J=8.5, 1H), 6.21 (dd, J=2.5, 8.2, 1H), 6.03 (d, J=2.5, 1H), 3.73 (s, 3H), 3.27 (m, 2H), 2.59 (m, 1H), 1.86 (m, 1H), 1.75 (m, 2H), 1.48 (m, 1H), 0.968 (t, J=7.4, 3H).

Provenance & Evidence