Formaldehyde → HCID 118022357, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of compound from Example 109 (64.6 mg, 0.2 mmol) in MeOH (3 mL) and AcOH (0.3 mL) was added HCHO (30.0 mg, 1.0 mmol) dropwise with stirring at 30° C. NaBH3CN (61 mg, 1.0 mol) was added in portions at 30° C. The reaction mixture was stirred for 2 h at 30° C. It was then quenched with saturated aqueous NH4Cl (5 mL), extracted with EtOAc (20 mL), dried over Na2SO4, filtered and concentrated. The residue was purified by column chromatography on silica gel (PE:EA=2:3) to give the title compound (30 mg, 43%) as a light green solid. 1H NMR (Methanol-d4 400 MHz): δ 7.54 (d, J=2.4 Hz, 1H), 7.47 (d, J=2.4 Hz, 1H), 7.37 (dd, J1=2.4, J2=8.4 Hz, 1H), 7.11 (d, J=8.4 Hz, 1H), 7.04 (d, J=2.4 Hz, 1H), 3.93 (s, 3H), 3.63 (s, 3H), 2.94 (s, 3H), 2.86 (s, 6H). LCMS (M+H)+ 352.

Provenance & Evidence