An efficient method for the reduction of aromatic azides to anilines via the Staudinger reaction using tri-n-butylphosphonium tetrafluoroborate with triethylamine in aqueous tetrahydrofuran solution is reported. The method enables the aromatic azido-selective reduction of 3-azido-5-(azidomethyl)benzene derivatives to efficiently afford anilines bearing an azidomethyl group.
The Preparation of 1,2,3-Trisubstituted Guanidines
作者:Alan R. Katritzky、Niveen M. Khashab、Sergey Bobrov
DOI:10.1002/hlca.200590131
日期:2005.7
diverse amines by use of the new reagent classes (bis-benzotriazol-1-yl-methylene)amines 13a–13f and benzotriazole-1-carboxamidines 17a–17i is described. The preparation is described for a variety of both acyclic and cyclic 1,2,3-trisubstituted guanidines in high yields.
Preparation of 1,2,5-Trisubstituted 1<i>H</i>-Imidazoles from Ketenimines and Propargylic Amines by Silver-Catalyzed or Iodine-Promoted Electrophilic Cyclization Reaction of Alkynes
作者:Xiaorong Zhou、Zheng Jiang、Lexing Xue、Ping Lu、Yanguang Wang
DOI:10.1002/ejoc.201500704
日期:2015.9
From readily available propargylic amines, 1,2,5-trisubstituted imidazoles are efficiently obtained through a cascade reaction catalyzed by AgOTf or promoted by molecular iodine. The AgOTf-catalyzed reaction involves nucleophilic addition of propargylic amine to ketenimine, a silver-catalyzedelectrophiliccyclizationreaction of alkyne, and a tautomerism/isomerism/metal-H exchange cascade. The iodine-mediated
Rh-Catalyzed annulations of N-methoxybenzamides with ketenimines: synthesis of 3-aminoisoindolinones and 3-diarylmethyleneisoindolinones with strong aggregation induced emission properties
作者:Xiaorong Zhou、Zhixing Peng、Hongyang Zhao、Zhiyin Zhang、Ping Lu、Yanguang Wang
DOI:10.1039/c6cc05456k
日期:——
Rhodium-catalyzed C–H activation/annulation reactions of ketenimines with N-methoxybenzamides furnished 3-aminoisoindolin-1-ones and 3-(diarylmethylene)isoindolin-1-ones.
Chemistry of iminofurans: XII.1 Synthesis of 2-(arylimino)furan-3(2H)-ones and their reaction with amines
作者:E. R. Nasibullina、A. N. Vasyanin、S. N. Shurov、A. E. Rubtsov
DOI:10.1134/s1070428016060154
日期:2016.6
2-(Arylimino)-5-(het)arylfuran-3(2H)-ones were synthesized by reaction of 5-(het)arylfuran-2,3-diones with N-(triphenyl-λ5-phosphanylidene)anilines, and their aminolysis afforded N-aryl-4-amino-4-(het)aryl-2-oxobut-3-enamides.