反应详情

A solution of 5-chloro-3-(4-hydroxypiperidinocarbonylmethyl)benzothiazolin-2-one (3.2 g) in dry pyridine (2.5 ml) and dry tetrahydrofuran (50 ml) was cooled. To the solution was dropwise added a solution of succinic anhydride (1.1 g) in dry tetrahydrofuran (5 ml) under stirring. The mixture was refluxed for 2 hours and then left overnight. The reaction mixture was treated in the same manner as that in Example 6 to yield the title compound as colorless crystals (2.5 g).

1. temperatureThe mixture was refluxed for 2 hours
2. additionThe reaction mixture was treated in the same manner as that in Example 6