Electroreductive intermolecular coupling of phthalimides with aldehydes: application to the synthesis of alkylideneisoindolin-1-ones
作者:Naoki Kise、Shinsaku Isemoto、Toshihiko Sakurai
DOI:10.1016/j.tet.2012.07.094
日期:2012.10
and N-unsubstituted phthalimides with aldehydes in the presence of chlorotrimethylsilane and triethylamine gave intermolecularly coupled products, 3-hydroxy-3-(1-hydroxyalkyl)isoindolin-1-ones. The coupling products were reduced with Et3SiH/BF3·Et2O to 3-(1-hydroxyalkyl)isoindolin-1-ones, which were dehydrated to alkylideneisoindolin-1-ones. From N-unsubstituted phthalimides, Z-isomers of alkylideneisoindolin-1-ones
的电还原Ñ -甲基,ñ - p -anisyl,和Ñ -未被取代与醛邻苯二甲酰亚胺在三甲基氯硅烷和三乙胺存在下,得到分子间偶联产物,3-羟基-3-(1-羟烷基)异吲哚啉-1-酮。用Et 3 SiH / BF 3 ·Et 2 O将偶联产物还原为3-(1-羟烷基)异吲哚啉-1-酮,将其脱水成亚烷基异吲哚啉-1-酮。从N-未取代的邻苯二甲酰亚胺立体定向地获得亚烷基亚异吲哚啉-1-酮的Z-异构体。