novel method for the synthesis of 5H-benzo[a]fluoren-5-one from inactive nonterminal 1,6-alkynes through a free radical tandem bicyclization process has been established. This process achieved a continuous cyclization triggered rarely by the α-position of α,β-unsaturated ketones. The reaction constructed three C–C bonds in one step with the readily accessible substrates and excellent substrate compatibility
建立了一种通过自由基串联双环化反应从非活性非末端1,6-
炔烃合成5 H-苯并[ a ]
芴-5-酮的新方法。该过程实现了连续环化,很少由α,β-不饱和酮的α-位置触发。该反应与易获得的底物和出色的底物相容性一步就构成了三个C–C键。