The Synthesis of Benzo[f]isoindole-1,3-dicarboxylates via an I2-Induced 1,3-Dipolar Cycloaddition Reaction
摘要:
An I-2-induced 1,3-dipolar cycloaddition reaction has been developed for the synthesis of benzo[f]-isoindole-1,3-dicarboxylates from quinones and N-substituted amino esters. The reaction proceeds in good to excellent yields in one step from 3 equiv of amino ester to react with the quinone structure. The utility of this transformation has been highlighted by its use for the construction of benzo[f]-isoindole-1,3-dicarboxylates, which have been identified in natural products exhibiting important biological activities.
A novel and efficientsynthesis of benzo[f]isoindole-4,9-diones through the I2-promoted cyclization reaction of N-substituted amino acidesters and quinones has been realized successfully via an unprecedented 1,3-dipolarcycloaddition using KF as the base. Different substituted amino esters were found able to react with quinones through a cycloadditionreaction to afford 2-substituted benzo[f]isoindole-4
苯并[一种新颖和有效的合成˚F ]通过I异吲哚-4,9-二酮2的促进的环化反应Ñ取代的氨基酸酯和醌已经成功地实现了通过使用KF作为一个前所未有的1,3-偶极环加成基地。发现不同的取代的氨基酯能够通过环加成反应与醌反应,得到2-取代的苯并[ f ]异吲哚-4,9-二酮。这些令人感兴趣的化合物的出人意料的,短暂的,有吸引力的和直接的合成是重要和相关的,并且为合成2-取代的苯并[ f ]异吲哚-4,9-二酮提供了极其优选的方法。