Synthesis of<i>ortho</i>-substituted aminopyridines. Metalation of pivaloylamino derivatives
作者:L. Estel、F. Linard、F. Marsais、A. Godard、G. Quéguiner
DOI:10.1002/jhet.5570260119
日期:1989.1
The three isomeric pivaloylaminopyridines were lithiated in more than 80% yields. Aminopyridine derivatives were treated by 2.5-3 equivalents of the complex BuLi-TMEDA at −10° in diethyl ether. Reaction of the lithiated species with various electrophiles afforded a number of ortho-substituted pivaloylaminopyridines in good yields. Secondary pyridine alcohols were oxidized to the corresponding aminopyridyl
将三种异构体新戊酰氨基吡啶以超过80%的产率进行锂化。在乙醚中,在-10°下用2.5-3当量的复合BuLi-TMEDA处理氨基吡啶衍生物。锂化物种与各种亲电试剂的反应以良好的产率提供了许多邻位取代的新戊酰氨基吡啶。仲吡啶醇被氧化成相应的氨基吡啶基酮。已合成了吡啶并嘧啶,苯并萘啶以及天然抗肿瘤生物碱玫瑰树碱的类似物,显示了该方法的多功能性。