反应详情

To a solution of compound 27d (67 mg, 0.33 mmol) in THF (2 mL) was added oxalyl dichloride (43 μL, 0.50 mmol) dropwise at 0° C., followed by the addition of 2 drops of DMF. The resultant mixture was stirred at 0° C. for 3 h, and then was warmed up to room temperature over 18 h. The solvents were removed under reduced pressure. The resultant residue, crude compound 27e, was dried under reduced pressure for 2 h and used in the following step without further purification.

1. customThe solvents were removed under reduced pressure
2. dry with materialThe resultant residue, crude compound 27e, was dried under reduced pressure for 2 h
3. customused in the following step without further purification