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.
Different Lewisacid promotor-steered highly regioselective phosphorylation of tertiary enamides with diverse H-phosphonates or H-phosphine oxides was developed. Under the catalysis of iron salt, the phosphonyl group was introduced into the α-position of tertiary enamides, affording various α-phosphorylated amides in high efficiency. On the other hand, the β-phosphorylated tertiary enamides were efficiently
An efficient and concise copper(I) bromide-mediated stereoselective β-sulfonylation of tertiary enamides with sulfonyl chlorides was achieved. This reaction proceeds smoothly with absolute E-selectivity and affords a range of (E)-β-amidovinyl sulfones bearing manifold functional groups in good yields. Moreover, this protocol features simple operation, excellent functional group tolerance and easy availability
实现了叔烯酰胺与磺酰氯的高效且简明的溴化铜 (I) 介导的立体选择性 β-磺酰化。该反应以绝对E选择性顺利进行,并以良好的产率提供一系列带有多种官能团的 ( E )-β-氨基乙烯基砜。此外,该协议还具有操作简单、功能组耐受性好和原材料易得等特点。机理实验表明直接磺酰化可能以自由基途径进行。
PALLADIUM-CATALYSED CONVENIENT SYNTHESIS OF 3-METHYLENEISOINDOLIN-1-ONES
作者:Chan Sik Cho、Hyung Sup Shim、Heung-Jin Choi、Tae-Jeong Kim、Sang Chul Shim
DOI:10.1081/scc-120004063
日期:2002.1.1
2'-Bromoacetophenone reacts with an array of aliphatic primary amines under carbon monoxide pressure in the presence of a catalytic amount of a palladium catalyst to afford 3-methyleneisoindolin-1-ones in moderate yields.