Fukuyama–Mitsunobu alkylation in amine synthesis on solid phase revisited: N-alkylation with secondary alcohols and synthesis of curtatoxins
作者:Christian A. Olsen、Matthias Witt、Steen H. Hansen、Jerzy W. Jaroszewski、Henrik Franzyk
DOI:10.1016/j.tet.2005.04.027
日期:2005.6
sulfonamides, as well as a method for synthesis of polyamines on solid phase. Here, an array of reagent combinations for solid-phase alkylation with secondary alcohols was examined in various solvents. The classical reagents DEAD–PPh3 as well as DEAD–PEt3 proved applicable for a single alkylation step. Sharply dropping yields in successive alkylation steps were identified as the most serious limitation of the
Fukuyama–Mitsunobu胺化策略已成为肽和磺酰胺N-烷基化的有效手段,以及固相合成多胺的方法。在此,在各种溶剂中检查了一系列与仲醇固相烷基化的试剂组合。经典试剂DEAD–PPh 3和DEAD–PEt 3被证明可用于单个烷基化步骤。连续烷基化步骤中收率的急剧下降被认为是使用伯醇,尤其是仲醇在多胺SPS中使用福山-光延反应的最严重限制。