反应详情

A solution of ethyl 6-(3-chloro-4-fluorobenzyl)-4-hydroxy-5-oxo-5,6,7,8-tetrahydro-2,6-naphthyridine-1-carboxylate 2-oxide (23 g, 58 mmol) in acetic anhydride (400 mL) was heated under nitrogen at 100° C. for one hour. The product mixture was concentrated under vacuum to the title bisacetate and was used in the following step without further purification.

1. concentrationThe product mixture was concentrated under vacuum to the title bisacetate
2. customwas used in the following step without further purification