Table 3.
Reaction conditions:
1a (0.1 mmol), 5 (1.5 equiv), 10 mol % CuBr in iPrOH (1.0 mL) under an argon atmosphere at room temperature for 24 h.
48 h.
1a (0.1 mmol), 5 (1.5 equiv), CuBr (10 mol %), MeOH (1.0 mL), 48 h.
1a (0.05 mmol), 5 (1.5 equiv), CuBr (10 mol %), MeOH (1.0 mL), H2O (1.0 mL), DMF (0.15 mL), 48 h. Yields provided in square brackets are reported as a % conversion determined from reverse-phase HPLC. Tyrs: 4-diphenylsulfiliminyl Tyrosine.