Meldrum's Acids as Acylating Agents in the Catalytic Intramolecular Friedel−Crafts Reaction
作者:Eric Fillion、Dan Fishlock、Ashraf Wilsily、Julie M. Goll
DOI:10.1021/jo0483724
日期:2005.2.1
dialkyl thioether, aryl methyl ether, aryl TIPS and TBDPS ethers, nitrile- and nitro-substituted aryls, alkyl and aryl halides) for a variety of 5-benzyl (enolizable Meldrum's acids) and 5-benzyl-5-substituted Meldrum's acids (quaternized Meldrum's acids), forming 1-indanones and 2-substituted-1-indanones, respectively, are delineated. This method was further applied to the synthesis of 1-tetralones,
Concise Synthesis of the ABC-Ring System of the Azafluoranthene, Tropoisoquinoline and Proaporphine Alkaloids: An Olefin Hydroacylation/Pomeranz–Fritsch Cyclization Approach
作者:Didier Vargas、Enrique Larghi、Teodoro Kaufman
DOI:10.1055/s-0037-1611711
日期:2019.5
azafluoranthene (triclisine), tropoisoquinoline (pareitropone) and proaporphine (prodensiflorin B) alkaloids, is reported. The synthetic sequence entailed a novel 40% KF/Al2O3-mediated hydroacylation of a 2-allyl-benzaldehyde derivative, obtained in two steps from isovanillin, through O-allylation and Claisen rearrangement to assemble the AC-ring system. This was followed by an O-methylation and a reductive amination
摘要 朝向装饰环戊二烯并[A直接的方法IJ ]异喹啉体现azafluoranthene(triclisine),tropoisoquinoline(pareitropone)和proaporphine(prodensiflorin B)生物碱的ABC-环系统特性报道。合成序列需要新型的40%KF / Al 2 O 3介导的2-烯丙基苯甲醛衍生物的加氢酰化作用,该步骤可从异香兰素分两步通过O-烯丙基化和Claisen重排组装成AC环系统。然后进行O-甲基化,并用氨基缩醛对所得的茚满酮进行还原胺化。接下来实施了改良的Pomeranz-Fritsch环化反应,以通过磺酰胺化安装B环,然后进行酸促进的环化反应和最后的脱磺酰化反应原地。 朝向装饰环戊二烯并[A直接的方法IJ ]异喹啉体现azafluoranthene(triclisine),tropoisoquinoline(pareitropon