Reactions of 2-benzylidenemalononitrile and 2-nitro-3-phenylacrylonitrile with aryl azides
摘要:
Reactions of 2-benzylidenemalononitrile and 2-nitro-3-phenylacrylonitrile with aryl azides in diethyl ether at room temperature gave mixtures of regioisomeric 1(3)-aryl-5-phenyl-4,5-dihydro-1(3)H-1,2,3-triazole-4,4-dicarbonitriles and 1-aryl-5(4)-phenyl-1H-1,2,3-triazole-5(4)-carbonitriles, respectively. 2-Benzylidenemalononitrile reacted with the same arylazides on heating in boiling chloroform to produce 1-aryl-2-phenylaziridine-2,2-dicarbonitriles.
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。
Novel synthesis of 1,4,5-trisubstituted 1,2,3-triazoles via a one-pot three-component reaction of boronic acids, azide, and active methylene ketones
作者:Jian Zhang、Guanyi Jin、Senhan Xiao、Jingjing Wu、Song Cao
DOI:10.1016/j.tet.2012.12.086
日期:2013.3
A series of 1-aryl-5-trifluoromethyl (or difluoromethyl)–1,4,5-trisubstituted 1,2,3-triazoles were synthesized in high yield by a novel one-potthree-component reaction of arylboronic acids, sodium azide, and active methylene ketones, such as ethyl 4,4-difluoroacetoacetate or ethyl 4,4,4-trifluoroacetoacetate in the presence of Cu(OAc)2 and piperidine using a DMSO/H2O (10/1) mixture as solvent.
Organocatalytic Enamide–Azide Cycloaddition Reactions: Regiospecific Synthesis of 1,4,5‐Trisubstituted‐1,2,3‐Triazoles
作者:Lee Jin Tu Danence、Yaojun Gao、Maoguo Li、Yuan Huang、Jian Wang
DOI:10.1002/chem.201002775
日期:2011.3.21
Heterocycles in one click: A novel organocatalytic enamide–azide cycloadditionreaction has been developed. This synthetic procedure represents a new method for the efficient construction of 1,4,5‐trisubstituted‐1,2,3‐triazoles under mild reaction conditions. Most significantly, the investigated process is highly regiospecific (see scheme).
Amine-Catalyzed [3+2] Huisgen Cycloaddition Strategy for the Efficient Assembly of Highly Substituted 1,2,3-Triazoles
作者:Lei Wang、Shiyong Peng、Lee Jin Tu Danence、Yaojun Gao、Jian Wang
DOI:10.1002/chem.201103393
日期:2012.5.7
has been utilized to fully promote the Huisgen [3+2] cycloaddition with a broad spectrum of carbonyl compounds and azides, thereby permitting the efficient assembly of a vast pool of highly substituted 1,2,3‐triazoles. In particular, the employment of commonly used and commercially available carbonyl compounds has resulted in the introduction of a diverse set of functional groups, such as alkyl, aryl
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
Photochemical C-H Activation: Generation of Indole and Carbazole Libraries, and First Total Synthesis of Clausenawalline D
作者:Isak Alimi、Richard Remy、Christian G. Bochet
DOI:10.1002/ejoc.201700300
日期:2017.6.16
N-arylbenzotriazoles leads respectively to indoles and carbazoles. Because the very rapid access to libraries of triazoles, for example by the copper-catalyzed [3+2] cycloaddition between alkynes and azides, this reaction allows the preparation of indoles in a single operation, by the simultaneous photolysis of the precursor library. As an example of such a synthesis of carbazoles, we prepared for the first