A direct, acid-catalyzed substitution reaction incorporates an N-phthalimidomethyl group on the 4' or 5' carbon of a psoralen in yields of 60-80% via the condensation of an N-hydroxymethylamide or phthalimide (e.g. N-hydroxymethylphthalimide) and an appropriately substituted psoralen. The phthalimide moiety is cleaved from the psoralen ring by treatment with hydrazine to give 60 to 70% yields of the aminomethylpsoralens.
一种直接的、酸催化的取代反应将N-邻苯二甲酰亚甲基基团引入光敏剂的4'或5'碳上,收率为60-80%,通过N-羟甲基酰胺或邻苯二甲
酰亚胺(例如N-羟甲基邻苯二甲
酰亚胺)与适当取代的光敏剂的缩合来实现。邻苯二甲
酰亚胺基团通过用
肼处理从光敏剂环中裂解,得到60到70%的
氨基甲基光敏剂收率。