Lewis Acid-Promoted Disproportionation Reaction of Aromatic Vinyl Ethers and Acetals and Its Application to the Synthesis of Paracotoin
作者:Young Dae Gong、Hiroko Tanaka、Nobuharu Iwasawa、Koichi Narasaka
DOI:10.1246/bcsj.71.2181
日期:1998.9
Aromatic vinyl ethers and acetals underwent a novel addition-fragmentation reaction affording olefins and esters in the presence of a Lewis acid. This reaction was applied to intramolecular cyclization reaction, giving five or six membered ring compounds in good yields. Paracotoin, an intermediate in the biosynthesis of shikimic acid, was synthesized using this cyclization reaction as the key step.
芳香族乙烯醚和缩醛在路易斯酸的存在下经历了一种新颖的加成-断裂反应,产生了烯烃和酯。该反应被应用于分子内环化反应,良好产率地得到五元或六元环化合物。作为木香酸生物合成中的中间体,帕拉可托因的合成利用了这一环化反应作为关键步骤。