An efficient and facile protocol for the synthesis of biologically and pharmaceutically important phthalimides is developed by l-proline-catalyzed reaction between two dienophiles of α,β-unsaturated aldehydes and maleimides. The reaction involves an efficient benzannulation that proceeds via a formal [4 + 2] cycloaddition of azadiene intermediates generated in situ from enals and N-substituted maleimides
通过α,β-不饱和醛的两个亲二烯体和马来
酰亚胺的1-脯
氨酸催化的反应,开发了一种有效且简便的合成
生物学和药学上重要的邻苯二甲
酰亚胺的方案。该反应涉及有效的苯环化,该苯环化是通过从烯醛和N-取代的马来
酰亚胺就地生成的氮杂二烯中间体的正式[4 + 2]环加成反应进行的。该协议提供了多种功能化的邻苯二甲
酰亚胺衍
生物,包括有效的COX-2酶
抑制剂。