Triethylamine → HCID 20765639, compound

Participants

Reaction Steps

To a suspension of Example 355 (700 mg, 1.4 mmol) in DME (10 mL) was added a solution of (BOC)2O (1.51 g, 6.9 mmol) in DME (5 mL), triethylamine (0.23 mL, 1.7 mmol) and DMAP (9 mg, 0.07 mmol). The reaction mixture was stirred at room temperature overnight. Additional triethylamine (0.23 mL) and DMAP (30 mg) were added, and the mixture was heated at 60° C. for 6 hours. After aqueous work up, the crude product was suspended in DME (5 mL) and water (5 mL) containing 200 mg of NaOH. The suspension was stirred for 5 hours at room temperature, and separated by HPLC to give the title compound (300 mg, 45%). 1H NMR (300 MHz, DMSO-d6) δ 1.78 (m, 2H), 2.10 (m, 2H), 3.60 (m, 2H), 3.80 (s, 3H), 3.86 (m, 2H), 6.58 (d, 1H), 7.10 (d, 1H), 7.25 (d, 1H), 7.28 (d, 1H), 7.50 (d, 1H), 7.58 (t, 1H), 7.77 (d, 1H), 7.80 (d, 1H), 8.50 (br s, 2H). MS (ESI+) m/z 481 (M+H)+. Anal calcd for C22H22N2Cl2SO4.0.75H2O: C, 47.34; H, 4.06; N, 4.60. Found: C, 47.31; H, 4.05; N, 4.43.

Provenance & Evidence