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