反应详情

A suspension of 5.2 g. of phthalic anhydride in 75 ml. of chloroform is stirred and treated with 5.7 g. of 2-(1-methylhydrazino)benzoxazole. A clear yellow solution results and the temperature drops several degrees, then rises to 33+ C. After about 15 min. precipitation of a solid begins. An additional 200 ml. of chloroform is added and the mixture is stirred overnight. The solid is filtered, washed with chloroform and dried to give 8.6 g. of product, m.p. 140°-142°.

1. additionA suspension of 5.2 g
2. additiontreated with 5.7 g
3. customA clear yellow solution results
4. customAfter about 15 min. precipitation of a solid
5. additionof chloroform is added
6. filtrationThe solid is filtered
7. washwashed with chloroform
8. customdried
9. customto give 8.6 g