Application of the Intramolecular Diels–Alder Vinylarenе (IMDAV) Approach for the Synthesis of Thieno[2,3-f]isoindoles
作者:Mykola D. Obushak、Fedor I. Zubkov、Maryana A. Nadirova、Yevhen-Oleh V. Laba、Vladimir P. Zaytsev、Julya S. Sokolova、Kuzma M. Pokazeev、Victoria A. Anokhina、Victor N. Khrustalev、Yuriy I. Horak、Roman Z. Lytvyn、Miłosz Siczek、Vasyl Kinzhybalo、Yan V. Zubavichus、Maxim L. Kuznetsov
DOI:10.1055/s-0039-1690833
日期:2020.8
3-(Thien-2-yl)- and 3-(thien-3-yl)allylamines, readily accessible from the corresponding thienyl aldehydes, can interact with a broad range of anhydrides and α,β-unsaturated acids chlorides (maleic, сitraconic, and phenyl maleic anhydrides, сrotonyl and сinnamyl chlorides, etc.) leading to the formation of a thieno[2,3-f]isoindole core. Usually, the reaction sequence involves three successive steps:
很容易从相应的噻吩基醛中获得的3-(噻吩-2-基)-和3-(噻吩-3-基)烯丙胺可以与各种酸酐和α,β-不饱和酰氯(马来酸,顺丁烯二酸)相互作用,以及苯基马来酸酐,叔丁酰和肉桂酰氯等),导致形成噻吩并[2,3- f ]异吲哚核。通常,反应顺序包括三个连续的步骤:初始烯丙胺的氮原子的酰化,分子内Diels-Alder乙烯基芳烃(IMDAV)反应以及Diels-Alder加合物中二氢噻吩环的最终芳构化。彻底研究了该方法的范围和局限性。借助X射线分析表明,关键步骤IMDAV反应通过exo进行。-过渡态,引起目标杂环的单一非对映异构体的排他形成。在马来酸酐的情况下,该方法允许获得官能取代的噻吩并[2,3- f ]异吲哚羧酸,其对于进一步转化和随后的生物筛选是潜在有用的底物。