Herein, we report an efficient 1,5,7-Triazabicyclo[4.4.0]dec-5-ene (TBD)-catalyzed tandem intermolecular amidation and regioselective intramolecular 6-exo-dig cyclization of alkynyl esters to efficiently access pyrazine-1(2H)-one scaffolds. This organo-catalyzed [5 + 1] annulation features a broad substrate scope concerning both annulating partners. Total syntheses of peramine and formal syntheses
在此,我们报道了一种有效的1,5,7-三
氮杂双环[4.4.0]dec-5-ene(TBD)催化的串联分子间酰胺化和炔基酯的区域选择性分子内6- exo -dig环化,以有效地获得pyrazine-1( 2 H )-一个支架。这种有机催化的 [5 + 1] 成环具有涉及两个成环伴侣的广泛底物范围。实现了波胺的全合成和二
溴邻苯二甲酸酯
天然产物的形式合成,展示了该方法的应用潜力。