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