反应详情

A 90 g. portion of the product of Example 1 was dissolved in 1.5 l. of chloroform and 70 g. of hexamethylenetetramine was added. The mixture was stirred at reflux temperature for 4 hours, and was filtered hot. The solids were dried under vacuum to obtain 143 g. of impure product, m.p. 159°-160°, which contained about 93 percent product and 7 percent hexamethylenetetramine.

1. temperatureat reflux temperature for 4 hours
2. filtrationwas filtered hot
3. customThe solids were dried under vacuum
4. customto obtain 143 g