反应详情

A solution of boronic acid 4 (7.60 g, 19.4 mmol) in DCM (300 mL) at 0° C. is treated with DIPEA (7.40 mL, 42.7 mmol), followed by acid chloride 8 (6.21 g, 23.3 mmol) in one portion. After warming to RT, the solution is stirred 3 h. Analysis by LC/MS at this juncture confirmed the reaction is complete. Thus the solvent is removed in vacuo and the residue purified by chromatography (gradient elution—60% EtOAc in heptane with 0.5% triethylamine increasing to neat EtOAc with 0.5% triethylamine, then 10-20% MeOH in EtOAc with 0.5% triethylamine) to afford the title compound.

1. customThus the solvent is removed in vacuo
2. customthe residue purified by chromatography (
3. washgradient elution—60% EtOAc in heptane with 0.5% triethylamine increasing to neat EtOAc with 0.5% triethylamine