A Direct Synthesis of γ-, δ-, and ε-Lactones Utilizing SmI<sub>2</sub>-induced Barbier-type Reaction in the Presence of Hexamethylphosphoric Triamide (HMPA)
作者:Kenji Otsubo、Kisa Kawamura、Junji Inanaga、Masaru Yamaguchi
DOI:10.1246/cl.1987.1487
日期:1987.7.5
By using an efficient reduction system of SmI2-THF-HMPA, the coupling reaction of β-, γ, or δ-bromoesters with carbonyl compounds was completed within a minute at room temperature affording γ-, δ-, or e-lactones, respectively, in good yields. Cp2ZrCl2 was also found to be effective for the coupling with ketones.
通过使用 SmI2-THF-HMPA 的高效还原体系,β-、γ 或 δ-溴酯与羰基化合物的偶联反应在室温下 1 分钟内完成,分别得到 γ-、δ-或 e-内酯, 收成不错。 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 还发现 Cp2ZrCl2 对与酮的偶联有效。