Reaction of<i>N</i>-(4-Pyridylrnethyl)benzamide<i>N</i>-oxides and<i>N</i>-[(α-acetoxy)-4-pyridylmethyl]benzamides with 1,3-diphenyl-1,3-propanedione
作者:Miguel F. Braña、María L. López Rodríguez、José M. Castellano、Purificación Fernández、Amando Garrido-Pertierra
DOI:10.1002/jhet.5570270255
日期:1990.2
Reaction of N-(4-pyridylmethyl)benzamide N-oxides 2 with 1,3-diphenyl-1,3-propanedione in the presence of acetic anhydride afforded 1,1-dibenzoyl-2-(4-pyridyl)-2-(benzoylamino)ethanes 4 in low yield. Treatment of N-[(α-acetoxy)4-pyridylmethyl]benzamides 3 with 1,3-diphenyl-1,3-propanedione in the presence of triethylamine and chloroform as a solvent provided 4 in high yield. Reaction of 4 with nucleophiles
的反应ñ - (4-吡啶基甲基)苯甲酰胺Ñ -oxides 2与乙酸酐,得到存在1,3-二苯基-1,3-丙二酮1,1-二苯甲酰基-2-(4-吡啶基)-2-(苯甲酰氨基)乙烷4收率低。在三乙胺和氯仿作为溶剂存在下,用1,3-二苯基-1,3-丙二酮处理N -[(α-乙酰氧基)4-吡啶基甲基]苯甲酰胺3提供了高产率的4。4与亲核试剂(如肼,甲基和苯肼)反应,得到相应的吡唑5。