I<sub>2</sub>/DMSO-Promoted Synthesis of Diaryl Sulfide- and Selenide-Embedded Arylhydrazones
作者:Arun Dhurey、Subhro Mandal、Animesh Pramanik
DOI:10.1021/acs.joc.2c02974
日期:2023.5.5
derivatization of arylhydrazones are important in pharmaceutical, medicinal, material, and coordination chemistry. In this regard, a facile I2/DMSO-promoted cross-dehydrogenative coupling (CDC) for direct sulfenylation and selenylation of arylhydrazones has been accomplished utilizing arylthiols/arylselenols at 80 °C. This method provides a metal-free benign route for the synthesis of a variety of arylhydrazones
芳基腙的功能化和衍生化在制药、医药、材料和配位化学中具有重要意义。在这方面,在 80 °C 下利用芳基硫醇/芳基硒醇完成了用于芳基腙直接硫化和硒基化的简便I 2 /DMSO 促进的交叉脱氢偶联 (CDC)。该方法为合成各种嵌入不同二芳基硫化物和硒化物部分的芳基腙提供了一种无金属的良性途径,收率从高到高。在该反应中,分子 I 2充当催化剂,DMSO 用作温和氧化剂和溶剂,通过 CDC 介导的催化循环生成多种硫基和硒基芳基腙。
Efficient Synthesis of Fully Substituted and Diversely Functionalized Pyrazoles through <i>p</i>‐TSA Catalyzed One‐Pot Condensation of Cyclic <i>β</i>‐Diketones, Arylglyoxals and Arylhydrazones
作者:Arun Dhurey、Subhro Mandal、Animesh Pramanik
DOI:10.1002/ejoc.202300770
日期:2023.10.21
An acid catalyzed one-pot condensation of readily available cyclic β-diketones, arylglyoxals and arylhydrazones produces a library of diverselyfunctionalized pyrazole derivatives in excellent yield under metal-catalyst-free benign conditions.
Organocatalytic Activation of Donor–Acceptor Cyclopropanes: A Tandem (3 + 3)-Cycloaddition/Aryl Migration toward the Synthesis of Enantioenriched Tetrahydropyridazines
作者:Arijit Hazra、Raghunath Dey、Apoorv Kushwaha、T. J. Dhilip Kumar、Prabal Banerjee