Gold-Catalyzed Intramolecular Allylic Amination of 2-Tosylaminophenylprop-1-en-3-ols. A Concise Synthesis of (±)-Angustureine
作者:Prasath Kothandaraman、Shi Jia Foo、Philip Wai Hong Chan
DOI:10.1021/jo900917q
日期:2009.8.21
ionization of the starting material, which causes intramolecular nucleophilic addition of the sulfonamide unit to the allylic cation moiety and construction of the 1,2-dihydroquinoline. The utility of this N-heterocyclic ring forming strategy as a synthetic tool that makes use of alcohols as pro-electrophiles was exemplified by its application to the synthesis of the bioactive tetrahydroquinoline alkaloid
本文描述了依赖于AuCl 3 / AgSbF 6催化2-甲苯磺酰基氨基苯基丙-1-烯-3-醇的分子内烯丙基胺化的1,2-二氢喹啉的有效合成途径。独特地,发现该反应仅在金和银催化剂组合存在下在室温下快速进行,并以40-91%的产率生产1,2-二氢喹啉产物。已证明该方法适用于广泛的包含吸电子,给电子和空间要求高的底物组合的2-tosylaminophenylprop-1-en-3-ols。建议该机理涉及通过AuCl 3 / AgSbF 6活化醇底物催化剂。这之后是起始材料的电离,其导致磺酰胺单元的分子内亲核加成至烯丙基阳离子部分和1,2-二氢喹啉的构建。该N-杂环成环策略作为利用醇作为亲电子试剂的合成工具的实用性通过其在生物活性四氢喹啉碱生物碱(±)-鸟苷的合成中的应用来举例说明。