Preparation and synthetic applications of iminophosphoranes derived from o-substituted arylazides: preparation of pyrazolo[1,2-b]indazole, 4H-3,1-benzoxazine and quinoline derivatives. Crystal structure of 2-[2-(4-methoxybenzoylamino)phenyl]-4-methylquinoline.
作者:Pedro Molina、Carlota Conesa、Asunción Alías、Antonio Arques、María D. Velasco、Antonio L. Llamas-Saiz、Concepción Foces-Foces
DOI:10.1016/s0040-4020(01)87234-3
日期:1993.8
dependent on the nature of the ortho-substituent. The Aza Wittig-type reaction of iminophosphorane derived from the ortho-azido acetophenone with isocyanates and aroyl chlorides leads to the previously unreported 4-methylene-4H-3,1-benzoxazine ring. The crystal and molecular structure of 2-[2-(4-methoxybenzoylamino)phenyl]-4-methylquinoline has been established by X-Ray diffraction methods.
An unexpected one-pot synthesis of multi-substituted quinolines via a cascade reaction of Michael/Staudinger/aza-Wittig/aromatization of ortho-azido-β-nitro-styrenes with various carbonyl compounds
作者:Zhi-Hua Yu、Hu-Fei Zheng、Wei Yuan、Zi-Long Tang、Ai-Dong Zhang、De-Qing Shi
DOI:10.1016/j.tet.2013.07.050
日期:2013.9
Multi-substituted quinolines 3 were unexpectedly prepared from a cascadereaction of ortho-azido-β-nitro-styrenes with various carbonyl compounds. This method takes advantages of mild condition, simple work-up, high yield as well as wide substrate scope, which makes this method powerful for one-potsynthesis of multi-substituted quinolines.
Rh<sub>2</sub>(II)-Catalyzed Nitro-Group Migration Reactions: Selective Synthesis of 3-Nitroindoles from β-Nitro Styryl Azides
作者:Benjamin J. Stokes、Sheng Liu、Tom G. Driver
DOI:10.1021/ja111060q
日期:2011.4.6
Rhodium carboxylate complexes (1 mol %) catalyze the migration of electron-withdrawing groups to selectively produce 3-substituted indoles from beta-substituted styryl azides. The relative order of migratorial aptitude for this transformation is ester << amide < H < sulfonyl < benzoyl << nitro.