Studies directed toward total synthesis of rhodocomatulins: A regioselective synthesis of brominated hydroxyanthraquinones by anionic annulations
作者:Md Raja Sk、Soumen Chakraborty、Dipakranjan Mal
DOI:10.1080/00397911.2017.1401637
日期:2018.2.1
ABSTRACT In this work, brominated hydroxyanthraquinones, which are the core structural motif of naturally occurring bromorhodocomatulins, were successfully synthesized using Hauser annulation reaction as the key step. When brominated Michael acceptors (brominated p-quinone monoketals) and cyanophthalides or bromocyanophthalides (Hauser donors) were reacted under the annulation conditions, brominated
摘要 在这项工作中,使用 Hauser 环化反应作为关键步骤,成功合成了溴化羟基蒽醌,它们是天然存在的溴化红斑素的核心结构基序。当溴化迈克尔受体(溴化对醌单缩酮)和氰基苯或溴氰基苯(Hauser 供体)在环化条件下反应时,四个例子中溴化蒽醌的产率为 81-87%。在酸性淬灭时,获得固体产物,将其通过过滤分离并通过在丙酮中重结晶纯化。不需要色谱法。图形概要