The naturally occurring benzoquinones primin 1 and pallasone B 2 were synthesised by a simple protocol involving microwave accelerated Claisen rearrangement of allyl ethers 4, followed by hydrogenation of the side chain alkene, and oxidation to the quinone; by incorporating a ring-closing metathesis step, the method was extended to the synthesis of the ansa-bridged benzoquinone 11, a structure related to the ansamycin antibiotics.
天然存在的苯
醌类化合物primin 1和pallasone B 2,通过一个简便的方法合成,该方法包括使用微波加速的Claisen重排反应将
烯丙基醚4进行转化,随后对侧链烯烃进行氢化处理,并氧化成醌;通过加入环闭合烯烃交换步骤,该方法被扩展到合成ansa桥联的苯醌11,这是一种与ansa霉素抗生素相关的结构。