Synthesis of Diverse Nitrogen Heterocycles <i>via</i>
Palladium-Catalyzed Tandem Azide-Isocyanide Cross-Coupling/Cyclization: Mechanistic Insight using Experimental and Theoretical Studies
作者:Arshad J. Ansari、Ramdas S. Pathare、Antim K. Maurya、Vijai K. Agnihotri、Shahnawaz Khan、Tapta Kanchan Roy、Devesh M. Sawant、Ram T. Pardasani
DOI:10.1002/adsc.201700928
日期:2018.1.17
A rapid and elegant tandem azide–isocyanide cross‐coupling/cyclization protocol has been developed based on a nitrene transfer reaction. The palladium‐catalyzed ligand‐free methodology led to the synthesis of three different heterocyclic scaffolds with excellent atom/step/redox economy. Studies based on first‐principles‐based quantum calculations and control experiments unraveled a concerted process
A Mild and Facile Reduction of Azides to Amines by N,N-Dimethylhydrazine and Catalytic Ferric Chloride
作者:Ahmed Kamal、B. S. Narayan Reddy
DOI:10.1246/cl.1998.593
日期:1998.7
Reaction of a variety of azido compounds with N,N-dimethylhydrazine in the presence of a catalytic amount of ferric chloride hexahydrate in methanol results in excellent yields of the corresponding amino compounds. This reductive system is compatible with a wide assortment of functional groups and has also been extended towards the synthesis of pyrrolo[2,1-c][1,4]benzodiazepine antibiotics.
Microwave-Assisted Base-Catalyzed Cyclization and Nucleophilic Substitution of<i>O</i>-Azidobenzanilides to Synthesize 1,2-Disubstituted Indazol-3-ones
作者:Arthur Y. Shaw、Yi-Ru Chen、Chia-Hua Tsai
DOI:10.1080/00397910802663386
日期:2009.7.7
of 1,2-disubstituted indazol-3-ones were synthesized by microwave-assisted base-catalyzed cyclization and nucleophilicsubstitution of o-azidobenzanilides. Among five tested reaction conditions, the cyclization of o-azidobenzanilides catalyzed by sodium hydride in DMF, sequentially followed by the nucleophilicsubstitution under microwave irradiation, exhibited the optimal results. Moreover, compared
An Efficient One-Pot Strategy for the Synthesis of Triazole-Fused 1,4-Benzodiazepinones from N-Substituted 2-Azidobenzamides
作者:K. Majumdar、Sintu Ganai
DOI:10.1055/s-0033-1339346
日期:——
for the synthesis of 1,2,3-triazole-fused 1,4-benzodiazepinone derivatives fromN-substituted 2-azidobenzamides and propargyl bromide, in the presence of a base, is reported. The products are formed in good to excellent yields via N-alkylation followed by a 1,3-dipolar cycloaddition. A catalyst-free, one-pot strategy for the synthesis of 1,2,3-triazole-fused 1,4-benzodiazepinone derivatives from N-substituted