Microwave-Mediated Claisen Rearrangement Followed by Phenol Oxidation: A Simple Route to Naturally Occurring 1,4-Benzoquinones. The First Syntheses of Verapliquinones A and B and Panicein A
作者:Christopher J. Davis、Timothy E. Hurst、Aouregan M. Jacob、Christopher J. Moody
DOI:10.1021/jo050336x
日期:2005.5.1
2-methoxy-6-heptadecyl-1,4-benzoquinone (dihydroirisquinone, pallasone B; 4) were synthesized by a simple protocol involving microwave accelerated Claisen rearrangement of allyl ethers 10, followed by hydrogenation of the side chain alkene, and oxidation to the quinone. The Claisen-based methodology was extended to the first synthesis of the marine benzoquinones verapliquinones A and B (5 and 6), and panicein A
天然存在的1,4-苯醌2-甲氧基-6-丙基-1,4-苯醌(1),2-甲氧基-6-戊基-1,4-苯醌(primin 2),2-甲氧基-6-十五烷基-1,4-苯醌(3),2-甲氧基-6-十七烷基-1,4-苯醌(二氢铱,醌B; 4)是通过简单的方法合成的,该方法涉及微波加速烯丙基醚10的克莱森重排,然后氢化侧链烯烃,然后氧化成醌。基于克莱森(Claisen)的方法扩展到了海洋苯醌,verapliquinones A和B(5和6)和panicein A(7)的首次合成。异双呋喃酮(9)也是通过类似的策略合成的。