反应详情

To the title compound of Step (B) and 0.048 ml dimethylformamide (DMF) in 19 ml CH2Cl2, oxalyl chloride (2M in CH2Cl2, 2.38 ml, 4.75 mmol) was added. The reaction was stirred at room temperature for 1 hour and concentrated to give the title compound of this step as a gum.

1. concentrationconcentrated