Synthesis of Paclitaxel. 1. Synthesis of the ABC Ring of Paclitaxel by SmI<sub>2</sub>-Mediated Cyclization
作者:Keisuke Fukaya、Yuta Tanaka、Ayako C. Sato、Keisuke Kodama、Hirohisa Yamazaki、Takeru Ishimoto、Yasuyoshi Nozaki、Yuki M. Iwaki、Yohei Yuki、Kentaro Umei、Tomoya Sugai、Yu Yamaguchi、Ami Watanabe、Takeshi Oishi、Takaaki Sato、Noritaka Chida
DOI:10.1021/acs.orglett.5b01173
日期:2015.6.5
A convergent synthesis of the ABC ring of antitumor natural product paclitaxel (Taxol) is described. SmI2-mediated reductive cyclization of an allylic benzoate possessing an aldehyde function, synthesized from tri-O-acetyl-D-glucal and 1,3-cyclohexanedione, smoothly afforded the highly strained 6-8-6 tricarbocyclic Structure in 66% yield.