Covell Dustin J, White M Christina
Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine Philadelphia, PA 19104, USA.
Department of Chemistry, Roger Adams Laboratory, University of Illinois Urbana, IL 61801, USA.
Tetrahedron. 2013 Sep 9;69(36):7771-7778. doi: 10.1016/j.tet.2013.05.012.
Chiral oxygenated molecules are pervasive in natural products and medicinal agents; however, their chemical syntheses often necessitate numerous, wasteful steps involving functional group and oxidation state manipulations. Herein a strategy for synthesizing a readily diversifiable class of chiral building blocks, allylic alcohols, through sequential asymmetric C-H activation/resolution is evaluated against the state-of-the-art. The C-H oxidation routes' capacity to strategically introduce oxygen into a sequence and thereby minimize non-productive manipulations is demonstrated to effect significant decreases in overall step-count and increases in yield and synthetic flexibility.
手性氧化分子在天然产物和药物制剂中普遍存在;然而,它们的化学合成通常需要大量浪费的步骤,涉及官能团和氧化态的操作。本文评估了一种通过顺序不对称C-H活化/拆分合成一类易于多样化的手性结构单元——烯丙醇的策略,并与现有技术进行了对比。结果表明,C-H氧化路线能够有策略地将氧引入反应序列,从而最大限度地减少非生产性操作,显著减少总步骤数,提高产率和合成灵活性。