Intramolecular Diels–Alder and [3+2] Cycloaddition Reactions in the One-Pot Synthesis of Epoxypyrrolo[3,4-g]indazoles
作者:Abdolali Alizadeh、Kaveh Amir Ashjaee Asalemi、Mohammadreza Halvagar
DOI:10.1055/s-0037-1612426
日期:2019.8
intramolecular Diels–Alder (IMDA) reaction. A one-pot approach for the synthesis of epoxypyrrolo[3,4-g]indazoles is presented. The first step was initiated by a three-component reaction of an isocyanide, a dialkyl acetylenedicarboxylate, and 2-furancarboxylic acid, and led to 1,3-dioxoepoxyisoindole, followed by the addition of hydrazonoyl chloride through a [3+2]-cycloaddition reaction in the second
抽象的 提出了一种一锅法合成环氧吡咯并[3,4- g ]吲唑的方法。第一步是由异氰酸酯,乙炔二羧酸二烷基酯和2-呋喃羧酸的三组分反应引发的,并生成1,3-二氧代环氧异吲哚,然后通过[3 + 2]-环加成反应加入酰氯。第二步反应。形成最终化合物的关键步骤涉及通过分子内Diels–Alder(IMDA)反应的双环化策略。 提出了一种一锅法合成环氧吡咯并[3,4- g ]吲唑的方法。第一步是由异氰酸酯,乙炔二羧酸二烷基酯和2-呋喃羧酸的三组分反应引发的,并生成1,3-二氧代环氧异吲哚,然后通过[3 + 2]-环加成反应加入酰氯。第二步反应。形成最终化合物的关键步骤涉及通过分子内Diels–Alder(IMDA)反应的双环化策略。