摘要
以各种取代的邻羟基苯乙酮为起始原料,经Vilsmeier试剂环合得中间体3-甲酰基色酮,不经分离纯化,直接与盐酸羟胺反应合成了一系列3-腈基4苯并吡喃酮类化合物,总收率47%-74%,其结构经^1HNMR,IR和MS确证。
3-Cyano-4-benzopyrones in overall yields of 47% -74% were synthesized from various substituted o-hydroxyacetophenones by one-pot method of cyclizafion in the presence of Vilsmeier reagent, and followed by treatment with hydroxylamine hydrochloride. The structures were confirmed by ^1H NMR, IR and MS.
出处
《合成化学》
CAS
CSCD
北大核心
2010年第1期113-115,共3页
Chinese Journal of Synthetic Chemistry