反应详情

A solution of the product from step d) (4.68 g, 13.8 mmol) in CH2Cl2 (77 ml) was treated with DMF (3-4 drops) and oxalyl chloride (2.72 ml, 31 mmol) at 22° C. for 1 hour. Next, the solvent was evaporated providing the subtitle compound (4.38 g) that was used without further purification.

1. customNext, the solvent was evaporated