Synthesis and characterization of phenanthrene derivatives for optoelectronic applications
作者:Sondes Raouafi、Faouzi Aloui、Amal Raouafi、Béchir Ben Hassine
DOI:10.1016/j.crci.2017.03.004
日期:2017.7
Abstract New phenanthrenederivatives, bearing cyano group at selected positions, have been prepared in good yields through Knoevenagel condensation and classical oxidative photocyclization. The optical properties of the cyanophenanthrenes have been investigated by UV–vis absorption. A cyclic voltammetry analysis showed a relatively high electronic affinity, indicating that they may be good candidates
Macrocyclic Sulfur Ligand Stabilized <i>Trans</i>‐Palladium Dichloride Complex: Syntheses, Structure, Chlorine Rotation, and Application in <i>α</i>‐Olefination of Nitriles by Primary Alcohols
This report describes the synthesis and characterization of a new seventeen membered macrocyclic sulfur ligand coordinated trans-palladium dichloride complex. The potential energy surface (PES) studies suggested a barrier of ~23.81 Kcal/mol for chlorine rotation. The complex showed excellent catalytic activity and selectivity for α-olefination of nitriles by primary alcohols. Only 2.5 mol% catalyst
Oxygen-Dependent Ligand-Controlled Iron-Catalyzed Chemoselective Synthesis of Olefins and Vinyl Nitriles
作者:Amit Kumar Guin、Subhajit Chakraborty、Subhankar Khanra、Santana Chakraborty、Nanda D. Paul
DOI:10.1021/acs.orglett.4c00455
日期:2024.4.5
An oxygen-dependent ligand-controlled chemoselective synthesis of vinyl nitriles and E-olefins by coupling a variety of alcohols and benzyl cyanides, catalyzed by a well-characterized, air-stable, easy-to-prepare Fe(II) catalyst (1a) bearing a redox-active arylazo pincer (L1a) is reported. The azo-moiety of the ligand backbone acts as an electron and hydrogen reservoir, enabling catalyst 1a to efficiently
在特征良好、空气稳定、易于制备的 Fe(II) 催化剂的催化下,通过偶联多种醇和苯乙腈,进行乙烯基腈和E-烯烃的氧依赖性配体控制化学选择性合成 ( 1a )据报道,其具有氧化还原活性芳基偶氮钳( L 1a )。配体主链的偶氮部分充当电子和氢储存库,使催化剂1a能够分别在氧气和氩气气氛下选择性地以中等至良好的产率有效地生产广谱乙烯基腈和E-烯烃。
Pyrenedione-Catalyzed α-Olefination of Nitriles under Visible-Light Photoredox Conditions
作者:Amreen K. Bains、Yadav Ankit、Debashis Adhikari
DOI:10.1021/acs.orglett.1c00162
日期:2021.3.19
Atmosphere-Controlled Chemoselectivity: Rhodium-Catalyzed Alkylation and Olefination of Alkylnitriles with Alcohols
作者:Junjun Li、Yuxuan Liu、Weijun Tang、Dong Xue、Chaoqun Li、Jianliang Xiao、Chao Wang
DOI:10.1002/chem.201704037
日期:2017.10.17
The chemoselectivealkylation and olefination of alkylnitriles with alcohols have been developed by simply controlling the reaction atmosphere. A binuclear rhodium complex catalyzes the alkylation reaction under argon through a hydrogen‐borrowing pathway and the olefination reaction under oxygen through aerobic dehydrogenation. Broad substrate scope is demonstrated, permitting the synthesis of some