Cascade of the Hinsberg / IMDAF reactions in the synthesis 2-arylsulfonyl-3a,6-epoxyisoindoles and 4a,7-epoxyisoquinolines in water
作者:Maryana A. Nadirova、Anastasia V. Khanova、Fedor I. Zubkov、Dmitriy F. Mertsalov、Irina A. Kolesnik、Sergey K. Petkevich、Vladimir I. Potkin、Anton A. Shetnev、Sofia I. Presnukhina、Anna A. Sinelshchikova、Mikhail S. Grigoriev、Vladimir P. Zaytsev
DOI:10.1016/j.tet.2021.132032
日期:2021.4
formation of a 3a,6-epoxyisoindole core in one synthetic stage. Usually, in boiling water, the interaction sequence involves two consecutive steps: the Hinsberg reaction and the intramolecular Diels–Alder furanе (IMDAF) reaction. The scope and limitations of the proposed method were thoroughly investigated, and it was revealed that the key [4 + 2] cycloaddition step proceeds through an exo-transition state
可以从相应的糠醛或糠胺中容易获得的N-糠基烯丙基胺在一个合成阶段中与多种芳基磺酰氯发生反应,形成3a,6-环氧异吲哚核。通常,在沸水中,相互作用序列涉及两个连续的步骤:Hinsberg反应和分子内Diels-AlderFuranе(IMDAF)反应。彻底研究了所提出方法的范围和局限性,并且揭示了关键的[4 + 2]环加成步骤是通过外向过渡态进行的,从而导致目标杂环的单一非对映异构体的排他性形成。该方法允许获得N-硫磺基取代的3a,6-环氧异吲哚和4a,7-环氧异喹啉,它们对于进一步转化和随后的生物筛选,特别是抗菌活性,可能是有用的底物。