Approaches to the Construction of Substituted 4-Amino-1H-pyrrol-2(5H)-ones
摘要:
Fully substituted 4-aminopyrrolones are easily accessed via simple routes starting from imines, ketones, or alpha-bromophenyl acetonitriles. Imines were reacted with KCN/NH4Cl in aqueous ethanol to produce alpha-arylamino benzyl cyanides. On the other hand, ketones were transformed to the desired alpha-amino nitriles using a modified Strecker reaction. Then, alpha-amino nitrile precursors were allowed to react with a suitable acyl halide to produce the corresponding amides. Further treatment of these amides with ethanolic KOH converted them to highly substituted 4-amino-1H-pyrrol-2(5H)-one derivatives in moderate to excellent yields.
Cycloaddition Reactions of N-Sulphdvylanilines and N-(αCyano-α-aryl)-Methylanilines
作者:Kewal Krishan Singal、Baldev Singh、Baldev Raj
DOI:10.1080/00397919908086052
日期:1999.3
Abstract Through the cycloaddition of N-(α-cyano-α-aryl)-methylanilines (II) on to N-sulphinylanilines (III) are synthesized 2,3,5-triaryl-4-imino-2H, 3H, 5H-[1.2.5]thiadiazoIidin-l-oxides (TV) in aood vields.