1-Benzyl-4,6-diphenyl-2-pyridone is lithiated by LiNPrI2 at the methylene carbon to form a carbanion which reacts with various electrophiles to give the corresponding 1-(α-substituted-benzyl)-4,6-diphenyl-2-pyridones. Potassium dimsylate converts 1-benzyl-4,6-diphenyl-2-pyridone into the 3-methyl derivative. The anion derived from 1-(α-methylbenzyl)-4,6-diphenyl-2-pyridone rapidly rearranges to the
LiNPr I 2将1-苄基-4,6
-二苯基-2-
吡啶酮在亚甲基碳上
锂化,形成碳负离子,该碳负离子与各种亲电试剂反应,生成相应的1-(α-取代-苄基)-4,6
-二苯基-2-
吡啶酮。
二甲苯磺酸钾将1-苄基-4,6
-二苯基-2-
吡啶酮转化为3-甲基衍
生物。由1-(α-甲基苄基)-4,6
-二苯基-2-
吡啶酮衍生的阴离子迅速重排为the
庚酮(18)。