Nucleophilic Iron Complexes in Proton‐Transfer Catalysis: An Iron‐Catalyzed Dimroth Cyclocondensation
作者:Aslihan Baykal、Dihan Zhang、Jakob Knelles、Isabel T. Alt、Bernd Plietker
DOI:10.1002/asia.201900821
日期:2019.9.2
The nucleophilic ironcomplex Bu4 N[Fe(CO)3 (NO)] (TBA[Fe]) is an active catalyst in C-H-amination but also in proton-transfer catalysis. Herein, we describe the successful use of this complex as a proton-transfer catalyst in the cyclocondensation reaction between azides and ketones to the corresponding 1,2,3-triazoles. Cross-experiments indicate that the proton-transfer catalysis is significantly
亲核铁配合物Bu4 N [Fe(CO)3(NO)](TBA [Fe])在CH胺化反应中也是质子转移催化中的活性催化剂。在本文中,我们描述了该复合物作为质子转移催化剂在叠氮化物和酮与相应的1,2,3-三唑之间的环缩合反应中的成功应用。交叉实验表明,质子转移催化显着快于腈转移催化,这将导致生成CH胺化产物。给出了成功地将Dimroth三唑-二氢吲哚成功合成为相应的三唑取代的二氢吲哚的实例。
Regioselective synthesis of triazoles via base-promoted oxidative cycloaddition of chalcones with azides in aqueous solution
作者:Wenchao Yang、Tao Miao、Pinhua Li、Lei Wang
DOI:10.1039/c5ra16974g
日期:——
A base-promoted oxidative cycloaddition of chalcones with azides was developed for the regioselective synthesis of trisubstituted triazoles under transition-metal-free conditions.
Lewis Base Catalyzed Aerobic Oxidative Intermolecular Azide-Zwitterion Cycloaddition
作者:Wenjun Li、Jian Wang
DOI:10.1002/anie.201408265
日期:2014.12.15
discovery of a novel aerobic oxidative intermolecular azide–zwitterion reaction catalyzed by an organocatalyst is presented. It is demonstrated that the merger of the Lewis base 1,8‐diazabicyclo[5.4.0]undec‐7‐ene and electron‐deficient olefins generates reactive zwitterion intermediates, which readily participate in cycloaddition reactions with an array of azides, thus providing facile entry to fully or
Organocatalytic 1,3-dipolar cycloaddition reaction of α,β-unsaturated ketones with azides through iminium catalysis
作者:Wenjun Li、Zhiyun Du、Kun Zhang、Jian Wang
DOI:10.1039/c4gc01929f
日期:——
1,3-Dipolarcycloadditionreaction of α,β-unsaturated ketones with azides through iminium catalysis has been developed. This method could furnish 1,4,5-trisubstituted 1,2,3-triazoles in good yields and high levels of regioselectivity.