Exposure of a series of α-(o-haloaryl)-substituted ketones to palladium-catalyzed carbonylation conditions leads to the formation of the corresponding isocoumarins. Balloon pressure of CO is sufficient to achieve high yielding reactions, and both cyclic and acyclic ketones are efficient substrates. The utility of the method is illustrated by a short synthesis of the natural product thunberginol A.
一系列α-(o-卤芳基)-取代酮在
钯催化的羰基化条件下处理,导致相应异
香豆素的形成。使用气球压力的CO即可实现高产率反应,且环状和非环状酮都是高效底物。这种方法的实用性通过简短合成
天然产物thunberginol A得到了说明。