Coupling of Sulfoxonium Ylides with Arynes: A Direct Synthesis of Pro-Chiral Aryl Ketosulfoxonium Ylides and Its Application in the Preparation of α-Aryl Ketones
作者:Alexánder Garay Talero、Bruna Simões Martins、Antonio C. B. Burtoloso
DOI:10.1021/acs.orglett.8b03126
日期:2018.11.16
A general, mild, and versatile synthesis of the challenging α-aryl-β-ketosulfoxonium ylides has been developed for the first time, substituting traditional methods starting from diazo compounds. The arylation of easily accessible β-ketosulfoxonium ylides using aryne chemistry allowed the preparation of a large scope of the pro-chiral ylides in very good yields (40 examples; up to 85%). As applications
Chemoselective formation of C–N bond in wet acetonitrile using amberlyst<sup>®</sup>-15(H) as a recyclable catalyst
作者:Sneha Nandy、Asit Kumar Das、Sanjay Bhar
DOI:10.1080/00397911.2020.1801745
日期:2020.11.1
economically efficient and environmentally benign protocol for the chemoselective one-pot synthesis of diversely N-substituted amides has been developed in good yield through the reaction of benzylic secondary alcohols as well as aliphatic tertiary alcohols and alkyl/aryl nitriles. Commercially available Amberlyst®-15(H) has been utilized at 80 °C as an air-stable and reusable heterogeneous inexpensive solid
摘要 通过苄基仲醇、脂肪族叔醇和烷基/芳基腈的反应,已经以良好的收率开发了一种经济有效且环境友好的化学选择性一锅法合成多种 N 取代酰胺的方案。市售的 Amberlyst®-15(H) 已在 80 °C 下用作空气稳定且可重复使用的非均相廉价固体酸催化剂,无需任何无水和惰性环境。本合成方案的吸引人的特点是反应条件温和、反应时间短、化学选择性好、原子经济性高和对各种敏感部分的耐受性。图形概要
Poly(4-vinylpyridine)-Supported Dual Acidic Ionic Liquid: A Novel Heterogeneous Catalyst for the Synthesis of β-Acetamido Ketones
A supported dual acidic ionic liquid catalyst was easily prepared from its starting materials and used as an environmentallyfriendly heterogeneous catalytic system for the synthesis of β-acetamidoketones from the four-component condensation of an aromatic aldehyde with acetophenone, acetyl chloride, and acetonitrile at room temperature. This catalyst was also applied as an efficient catalyst for
Palladium-Catalyzed C–N Bond Cleavage of 2<i>H</i>-Azirines for the Synthesis of Functionalized α-Amido Ketones
作者:Fen Xu、Xiao-Ju Si、Yuan-Yuan Song、Xing-Dong Wang、Chun-Sen Liu、Peng-Fei Geng、Miao Du
DOI:10.1021/acs.joc.8b03193
日期:2019.2.15
A Pd-catalyzed ring-opening reaction of 2H-azirines with carboxylic acids was developed. This reaction undergoes nucleophilic addition between 2,3-diaryl-2H-azirines and carboxylic acids followed by C–N single-bond cleavage and a subsequent thermalrearrangement. This method enables the rapid construction of valuable α-amido ketone derivatives with high atomic efficiency and superb functional group