Dimethylamine → HCID 69108521, compound

Participants

Reaction Steps

The hydrogenated compound 60 (2.2 g, 4.96 mmol) was dissolved in CH2Cl2 and stirred at room temperature under an atmosphere of argon. Triethylamine (0.829 mL, 5.95 mmol) and benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphate (BOP reagent, 2.413 g, 5.456 mmol) were added and the reaction mixture was stirred for 15 min. Dimethylamine (2.0 M solution in THF, 12.4 mL, 24.8 mmol) was added and the resulting solution was stirred at room temperature for about 2-3 h. The solvent was removed under reduced pressure and the resulting oil was taken up in EtOAc (100 mL). The organic layer was extracted with 0.5 N NaOH (1×30 mL), water (2×50.0 mL) and brine (1×50.0 mL). Drying and concentration of the organic layer gave the desired amide crude (1.2 g, ˜98%). Flash chromatography on silica gel (methanol-chloroform 1%-2%) yielded the desired amide 75(0.8 g 98%) 1H NMR (400 MHz, DMSO-d6): 7.32 (dd, J=7.6 and 2 HZ, 1H), 7.21 (m, 3H), 7.08 (dd, J=14 and 7.2 Hz, 2H), 6.83 (d, J=8.8 Hz, 2H), 6.75 (d, J=8.0 Hz, 1H), 4.53 (m, 1H) 3.55 (s, 3H), 2.89 (s, 3H), 2.85-2.58 (m, 7H), 2.59 (t, J=7.6 Hz, 2H), 1.31 (s, 9H).

Provenance & Evidence