Diverse privileged <i>N</i>-polycyclic skeletons accessed from a metal-free cascade cyclization reaction
作者:Wenzhong Li、Yu Wang、Huijing Qi、Ran Shi、Jiazhu Li、Si Chen、Xin-Ming Xu、Wei-Li Wang
DOI:10.1039/d1ob01206a
日期:——
An exquisite metal-free cascade cyclizationreaction of 2-acylbenzoic acids with amines was developed, which provided a powerful method for the one-potsynthesis of diverse isoindoloisoquinoline and benzoindolizinoindole derivatives. This protocol avoided the use of metal catalysts, proceeded with high efficiency and had broad substrate scope. These resulting products could be transformed into tertiary
Intramolecular Arylation of Tertiary Enamides through Pd(OAc)<sub>2</sub>-Catalyzed Dehydrogenative Cross-Coupling Reaction: Construction of Fused <i>N</i>-Heterocyclic Scaffolds and Synthesis of Isoindolobenzazepine Alkaloids
作者:Wenju Zhu、Shuo Tong、Jieping Zhu、Mei-Xiang Wang
DOI:10.1021/acs.joc.9b00010
日期:2019.3.1
Pd(OAc)2-catalyzed intramolecular dehydrogenative cross-coupling reaction between tertiaryenamides, which were derived from the condensation of 2-arylethylamines and methyl o-acetylbenzoate, and arenes enabled synthesis of 7,8-dihydro-5H-benzo[4,5]azepino[2,1-a]isoindol-5-one derivatives under mild conditions. The synthetic method was applied in the total synthesis of aporhoeadane alkaloids palmanine
Pd(OAc)2催化叔烯酰胺之间的分子内脱氢交叉偶联反应,后者是由2-芳基乙胺与邻乙酰基苯甲酸甲酯的缩合反应生成的,而芳烃则可以合成7,8-二氢-5 H-苯并[4] ,5] azepino [2,1 - a ] isoindol-5-one衍生物在温和的条件下。该合成方法仅需三到四个步骤即可用于阿魏酸钠,生物碱棕榈碱,伦诺沙明和邻苯二胺的全合成。
Metal‐Free Selective and Diverse Synthesis of Three Distinct Sets of Isoindolinones from 2‐Alkynylbenzoic Acids and Amines
The metal‐freeselective and diversesynthesis of threedistinctsets of isoindolinonesfrom2‐alkynylbenzoicacids and amines in a controlled manner is reported. This process features metalfree, readily available starting materials, broad substrate scope, excellent selectivity, good to high yields, good functional group tolerance, simple operation, high bond‐forming efficiency, and step economy.