The First Synthesis of Coniochaetones A and (±)-B: Two Benzopyranone Derivatives
作者:Kenji Mori、Gérard Audran、Honoré Monti
DOI:10.1055/s-1998-1628
日期:1998.3
An efficient synthesis of coniochaetone A and of racemate coniochaetone B was achieved by a short five-step procedure from methyl-di-O-methyl-p-orsellinate. The key step is a cascade reaction of 2′-hydroxy-6′-methoxy-4′-methyl-2-(methylsulfinyl)-acetophenone with succindialdehyde in the presence of piperidine which allows the direct building of the tricyclic benzopyranone structure.
通过简短的五步程序,从甲基-二-O-甲基-p-orellinate 中高效合成了coniochaetone A 和外消旋体coniochaetone B。关键步骤是2'-羟基-6'-甲氧基-4'-甲基-2-(甲基亚磺酰基)-苯乙酮与琥珀二醛在哌啶存在下发生级联反应,从而直接构建三环苯并吡喃酮结构。