反应详情

A solution of 3-n-butylamino-4-phenoxy-5-sulfamylbenzylamine (1.05 g; prepared as described in Example 289) and m-hydroxybenzaldehyde (0.45 g) in methanol (7 ml) is refluxed for 16 hours. The resulting solution is cooled to 0°-5° C. whereafter sodium borohydride (0.25 g) is added in portions during 5 minutes while stirring. After stirring at 22°-25° C. for a further 3 hours, acetic acid (0.5 ml) followed by water (20 ml) are added to precipitate crude (3-n-butylamino-4-phenoxy-5-sulfamylbenzyl)-3-hydroxybenzylamine. After filtration and recrystallization from ethanol, it is obtained with a melting point of 174°-175° C.

1. additionis added in portions during 5 minutes
2. stirringAfter stirring at 22°-25° C. for a further 3 hours
3. additionare added
4. customto precipitate crude (3-n-butylamino-4-phenoxy-5-sulfamylbenzyl)-3-hydroxybenzylamine
5. filtrationAfter filtration and recrystallization from ethanol
6. customit is obtained with a melting point of 174°-175° C.