作者:Annabel C. Murphy、Maya I. Mitova、John W. Blunt、Murray H. G. Munro
DOI:10.1021/np070673w
日期:2008.5.1
has often been hindered by long reaction sequences or low stereoselectivity in the synthesis leading to reference samples. The preparation of the four diastereoisomers of 4-methylproline by a concise and stereoselective route is presented and features a six-step route with late-stage stereodivergence, good stereoselectivity for both cis- and trans-series (75% and 88% de, respectively), and good overall
4-甲基脯氨酸(在许多肽类次级代谢产物中发现的一种稀有氨基酸)的完整立体化学特征通常由于合成过程中反应序列长或立体选择性低而受到阻碍,从而导致产生参考样品。介绍了一种通过简明和立体选择的路线制备4-甲基脯氨酸的四种非对映异构体的方法,该方法具有六步路线,具有后期立体发散性,对顺式和反式系列均具有良好的立体选择性(分别为75%和88%de )和良好的总体产量(累计产量为30-40%)。还提供了有关立体异构体的马菲衍生物的其他数据。