Development of a Bio-Inspired Acyl-Anion Equivalent Macrocyclization and Synthesis of a <i>trans-</i>Resorcylide Precursor
作者:Steven M. Mennen、Scott J. Miller
DOI:10.1021/jo070676d
日期:2007.7.1
N-pentafluorophenyl triazolium variant led to cyclization at room temperature within a short 90-min reaction time. These findings were applied to a range of substrates, including the synthesis of a key intermediate in a rapid synthesis of trans-resorcylide.
关于α,ω-二醛的大环化的研究表明,在反应的最终效率方面强烈依赖于环的大小。观察到强烈的催化剂依赖性,因为噻唑鎓盐导致没有可检测的产物形成,而缺电子的三唑鎓盐用作环化的预催化剂。出人意料的是,N-五氟苯基三唑鎓变体导致在室温下短短90分钟的反应时间内环化。这些发现被应用于一系列底物,包括快速合成反式间苯二酚的关键中间体的合成。