The phenyl-substitutedconduritolB 8 was prepared in racemic form in a five-step sequence starting from 2-phenyl-1,4-benzoquinone (10) (Scheme 1). The reaction mechanism of the key step 12b13 is discussed (Scheme 2).
从2-苯基-1,4-苯醌(10)开始,以五步顺序以外消旋形式制备苯基取代的Conduritol B 8(方案1)。讨论了关键步骤12b 13的反应机理(方案2)。