Partial Reduction of Annulated Heterocycles as a General Route to Medium Rings Containing Oxygen and Nitrogen
作者:Timothy J. Donohoe、Ali Raoof、Ian D. Linney、Madeleine Helliwell
DOI:10.1021/ol007035o
日期:2001.3.1
and pyrroles is described as part of a general strategy for the synthesis of medium ring heterocycles. After Birch reduction, the corresponding dihydro compounds were oxidatively cleaved to produce medium ring ethers and amines in an efficient manner. This methodology was successfully applied to the formation of eight- and nine-membered cyclic ethers and nine-membered cyclic amines. Attaching a chiral
环状呋喃和吡咯的制备被描述为合成中环杂环的一般策略的一部分。桦木还原后,将相应的二氢化合物氧化裂解,以有效方式生产中环醚和胺。该方法已成功应用于八元和九元环醚和九元环胺的形成。将手性助剂(双甲氧基甲基吡咯烷)与呋喃连接可以在95%ee中形成九元醚。