The novel reaction of ketones with o-oxazoline-substituted anilines
作者:Fen-Tair Luo、Vija K. Ravi、Cuihua Xue
DOI:10.1016/j.tet.2006.07.057
日期:2006.10
A variety of ketones react with o-oxazoline-substituted anilines in the presence of catalytic amount of p-toluenesulfonic acid in dry n-butanol to form 4-amino-substituted quinolines or 4-quinolones in fair to good yields.
2-alkyl-sufonylamino)phenyl-4-phenyl-1,3-oxazolines were found to be effective ligands for copper-catalyzed enantioselective cyclopropanation reaction of olefins. The reaction of styrene with d-menthyl diazoacetate in the presence of optically active coppercatalysts gave cyclopropanation products in a ratio of trans : cis = 83 : 17 with 63% cc (trans) and 84% cc (cis).
A Novel Synthesis of 1,2,3-Benzotriazinones from 2-(<i>o</i>-Aminophenyl)oxazolines
作者:Fernando Rocha-Alonzo、Daniel Chávez、Adrián Ochoa-Terán、David Morales-Morales、Enrique F. Velázquez-Contreras、Miguel Parra-Hake
DOI:10.1155/2017/2384780
日期:——
1,2,3-Benzotriazinones were synthesized in excellent yields by the reaction of 2-(o-aminophenyl)oxazolines and isoamyl nitrite in methanol. The crystal structure of the acetyl derivative of one of the 1,2,3-benzotriazinones provided additional support for the spectroscopic structural characterization of the title compounds.
Enantioselective Diels−Alder Reaction Using Chiral Mg Complexes Derived from Chiral 2-[2-[(Alkyl- or 2-[2-[(Arylsulfonyl)amino]phenyl]-4-phenyl-1,3-oxazoline
complexes derived from (R)-2-[2-[(alkyl- or (R)-2-[2-[(arylsulfonyl)amino]phenyl]-4-phenyl-1,3-oxazolines and methylmagnesium iodide were found to be efficient Lewis acid catalysts for the Diels-Alder reaction of 3-alkenoyl-1,3-oxazolidin-2-one with cyclopentadiene. Chiral ligands were easily prepared from readily available D-phenylglycinol in good yields. The reaction of 3-acryloyl-1,3-oxazolidin-2-one