Total Synthesis of (±)-Quebrachamine via [3+2] Cycloaddition and Efficient Chloroacetamide Photocyclization
作者:Barbora Bajtos、Brian L. Pagenkopf
DOI:10.1002/ejoc.200801154
日期:2009.3
The total synthesis of (±)-quebrachamine has been completed in 13 linear steps and 17.8 % overall yield. The indole core was constructed via a formal [3+2] dipolar cycloaddition between a functionalized nitrile and donor-acceptor cyclopropane, and the synthetically challenging nine-membered ring was secured by an efficient chloroacetamide photocyclization.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451
(±)-quebrachamine 的全合成已在 13 个线性步骤中完成,总产率为 17.8%。吲哚核心是通过功能化腈和供体-受体环丙烷之间的正式 [3+2] 偶极环加成构建的,具有合成挑战性的九元环通过有效的氯乙酰胺光环化作用得到保护。 (© Wiley-VCH Verlag GmbH & Co . KGaA, 69451 德国魏因海姆, 2009)