An N-Teoc [CO2(CH2)2TMS] protected form of the amino alcohol moiety found in the cinchona alkaloids was constructed by Curtius rearrangement followed by reaction of the isocyanate intermediate with TMS(CH2)2OH in one pot. Deprotection of the N-Teoc protective group and subsequent piperidine ring formation were easily accomplished with CsF in DMF at 110 °C in one pot to afford model compounds of the alkaloids.
通过 Curtius 重排,然后将
异氰酸酯中间体与 TMS(
CH2)2OH 反应,在一个反应釜中构建了
金鸡纳
生物碱中
氨基醇的 N-Teoc [CO2( )2TMS] 保护形式。N-Teoc 保护基团的脱保护和随后的
哌啶环形成可在
DMF 中用 CsF 在 110 ℃ 下一次反应轻松完成,从而得到
生物碱的模型化合物。