Nickel-Catalyzed Reductive Cross-Coupling of <i>N</i>-Acyl and <i>N</i>-Sulfonyl Benzotriazoles with Diverse Nitro Compounds: Rapid Access to Amides and Sulfonamides
作者:Erdong Qu、Shangzhang Li、Jin Bai、Yan Zheng、Wanfang Li
DOI:10.1021/acs.orglett.1c03535
日期:2022.1.14
Herein we report a Ni-catalyzed reductive transamidation of conveniently available N-acyl benzotriazoles with alkyl, alkenyl, and aryl nitro compounds, which afforded various amides with good yields and a broad substrate scope. The same catalytic reaction conditions were also applicable for N-sulfonyl benzotriazoles, which could undergo smooth reductive coupling with nitroarenes and nitroalkanes to
在此,我们报道了一种方便获得的N-酰基苯并三唑与烷基、烯基和芳基硝基化合物的 Ni 催化还原转酰胺基反应,该反应以良好的收率和广泛的底物范围提供了各种酰胺。相同的催化反应条件也适用于N-磺酰基苯并三唑,它可以与硝基芳烃和硝基烷烃进行平滑的还原偶联,得到相应的磺酰胺。
A convenient one-pot synthesis of ketone cyanohydrin esters in aqueous media
synthesis of ketone cyanohydrin esters in aqueous media is reported using N-acylbenzotriazoles as the acylating agents. In saturated aqueous sodium bicarbonate containing a catalytic amount of tetrabutylammonium bromide, the reaction of ketones with potassium cyanide and N-acylbenzotriazoles proceeded readily at room temperature to provide the corresponding O-acyl cyanohydrin derivatives in good to excellent
An Improved Synthesis of Polyfunctional Acyl Azides in PEG 400
作者:Khalid Widyan
DOI:10.1080/00304948.2020.1862029
日期:2021.3.4
(2021). An Improved Synthesis of Polyfunctional Acyl Azides in PEG 400. Organic Preparations and Procedures International: Vol. 53, No. 2, pp. 120-126.
Iridium Diamine Catalyst for the Asymmetric Transfer Hydrogenation of Ketones
作者:Henar Vázquez-Villa、Stefan Reber、Martin A. Ariger、Erick M. Carreira
DOI:10.1002/anie.201102732
日期:2011.9.12
A simple and very efficient chiral aqua iridium(III) diamine complex leads to excellent enantioselectivities in the asymmetrictransferhydrogenation of various α‐cyano and α‐nitro ketones. The catalyst provides the ortho‐substituted aromatic alcohols with especially high ee values. The diamine ligands can be used directly as chiral ligands; conversion into the corresponding sulfamide is not necessary
Novel synthesis of benzotriazolyl alkyl esters: an unprecedented CH<sub>2</sub> insertion
作者:Mohamed Elagawany、Lingaiah Maram、Bahaa Elgendy
DOI:10.1039/d0ra10413b
日期:——
We have developed a novel method for the synthesis of benzotriazolyl alkylesters (BAEs) from N-acylbenzotriazoles and dichloromethane (DCM) under mild conditions. This reaction is one of few examples to show the use of DCM as a C-1 surrogate in carbon-heteroatom bond formation and to highlight the versatility of using DCM as a methylene building block.