反应详情

0.840 g of the product of Step D of Example 3 and 0.640 g of amino benzoic acid were introduced into 15 ml of 1N hydrochloric acid and the solution was refluxed for 3 hours. The precipitate was filtered, washed with water and dried at 60° C. under reduced pressure to obtain 0.830 g of the expected product.

1. temperaturethe solution was refluxed for 3 hours
2. filtrationThe precipitate was filtered
3. washwashed with water
4. customdried at 60° C. under reduced pressure