Formaldehyde → HCID 57950316, compound

Participants

Reaction Steps

4-(4-Chloro-2-methoxyphenyl)-1-(9-methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indol-7-yl)pyridin-2(1H)-one (83 mg, 0.20 mmol) and 37% aqueous formaldehyde (24 μL, 0.30 mmol) were dissolved in 1:1 MeOH/CH2Cl2 (1.4 mL) and stirred at room temperature for 45 min. Sodium triacetoxyborohydride (84 mg, 0.40 mmol) was added, and the reaction was stirred at ambient temperature for 30 min. The reaction mixture was neutralized with saturated NaHCO3 solution and extracted with CH2Cl2 (3×25 mL). The combined organics were washed with brine (25 mL), dried over Na2SO4, filtered and concentrated to dryness under reduced pressure. Purification by flash column chromatography (12 g ISCO (1:1 hexanes/EtOAc)/(80:18:2 CH2Cl2/MeOH/NH4OH), 95:5 to 10:90 over 20 column volumes, hold for 10 column volumes) provided the title compound (77 mg, 89%) as a yellow film: 1H NMR (500 MHz, CDCl3) δ 7.55 (d, J=8.0 Hz, 1H), 7.41 (d, J=7.0 Hz, 1H), 7.35-7.34 (m, 1H), 7.31 (d, J=8.0 Hz, 1H), 7.07-7.03 (m, 2H), 7.00-6.99 (m, 1H), 6.81-6.80 (m, 1H), 6.43-6.42 (m, 1H), 3.87 (s, 3H), 3.66-3.65 (m, 2H), 3.48 (s, 3H), 2.87-2.86 (m, 2H), 2.81-2.80 (m, 2H), 2.58 (s, 3H).

Provenance & Evidence