Formaldehyde → HCID 68742758, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 3-(oct-1-ynyl)aniline (1.34 g, 6.67 mmol) in MeOH (35 mL) was added NaOMe (25% wt. in MeOH, 7.7 mL), followed by paraformaldehyde (1.0 g, 33.3 mmol). The resulting mixture was refluxed 2 h under argon. After cooling to 0° C., NaBH4 (1.27 g, 33.4 mmol) was added and the mixture was refluxed for 90 min. The reaction mixture was then cooled to rt, quenched with ice and extracted with dichloromethane (50 mL+30 mL). The combined extracts were washed with H2O and brine and dried (Na2SO4). Flash chromatography (eluent: EtOAc/Hex=1:10 to 1:6) gave N-methyl-3-(oct-1-ynyl)aniline as a light yellow oil (920 mg, 64%). 1H NMR (400 MHz, CDCl3) δ 7.10 (t, 1H, J=7.8 Hz), 6.77 (d, 1H, J=7.2 Hz), 6.66 (s, 1H), 6.55 (d, 1H, J=8.4 Hz), 3.80 (s, br, 1H, NH), 2.84 (s, 3H), 2.40 (t, 3H, J=7.0 Hz), 1.61 (quint, 2H, J=7.4 Hz), 1.46 (quint, 2H, J=6.8 Hz), 1.38-1.25 (m, 4H), 0.92 (t, 3H, J=6.6 Hz).

Provenance & Evidence