A facile and simple method for the preparation of 3,4-dialkyl-3,4-dihydro-2H-1,3-benzoxazin-2-ones or naphthoxazin-2-ones in high yields from aminoalkylphenols and aminoalkylnaphthols is described. The reactions of the products obtained with organolithium and Grignard reagents were studied, and a method for the preparation of N-[1-(2-hydroxyphenyl)alkyl]-N-alkylamides, which are of pharmaceutical interest, from benzoxazinones was developed. A possible reaction mechanism is also proposed. The relative configuration of chiral products was determined from conformational analysis of 1H NMR spectra.Key words: benzoxazinones, naphthoxazinones, organometallic reagents, amide preparation, aminoalkylphenols.
一种简便易行的方法,通过
氨基烷基
苯酚和
氨基烷基
萘酚的反应,高产率制备3,4-二烷基-3,4-二氢-2H-1,3-苯并噁嗪-2-酮或
萘噁嗪-2-酮。研究了产物与
有机锂和
格氏试剂的反应,并开发了一种从苯并噁嗪酮制备具有药物兴趣的N-[1-(2-羟基苯基)烷基]-N-烷基酰胺的方法。同时提出了可能的反应机理。通过构象分析的1H NMR光谱确定了手性产物的相对构型。关键词:苯并噁嗪酮,
萘噁嗪酮,有机
金属试剂,酰胺制备,
氨基烷基
苯酚。