Unexpected Formation of <i>N</i>-(1-(2-Aryl-hydrazono)isoindolin-2-yl)benzamides and Their Conversion into 1,2-(Bis-1,3,4-oxadiazol-2-yl)benzenes
作者:Codruţa C. Paraschivescu、Mihaela Matache、Cristian Dobrotă、Alina Nicolescu、Cătălin Maxim、Călin Deleanu、Ileana C. Fărcăşanu、Niculina D. Hădade
DOI:10.1021/jo400023z
日期:2013.3.15
mixture of geometrical isomers, in various ratios. Single crystal X-ray diffraction confirms the proposed structure and indicates a Z configuration of the C═N double bond substitutents. Optimization of the condensation reaction conditions enabled quantitative isolation of the cyclic isomer. Oxidation of the isomers with bis(trifluoroacetoxy)iodobenzene (PIFA) leads to rapid formation of new highly fluorescent
邻苯二甲醛与各种芳酰基肼之间的反应出乎意料地产生了N-(1-(2-芳基-肼基)异吲哚啉-2-基)苯甲酰胺以及可预测的1,2-双-芳酰基hydr。主要反应产物的NMR研究表明,存在各种比例的几何异构体混合物。单晶X射线衍射证实了所提出的结构,并表明了C═N双键取代基的Z构型。缩合反应条件的优化使得能够定量分离环状异构体。用双(三氟乙酰氧基)碘苯(PIFA)氧化异构体导致快速形成新的高荧光1,2-双(5-芳基-1,3,4-恶二唑-2-基)苯。