作者:Tamás Görbe、Richard Lihammar、Jan-E. Bäckvall
DOI:10.1002/chem.201704691
日期:2018.1.2
synthesis but only few methods are known for their enantioselective preparation. Chiral resolution is one of these approaches that leaves one enantiomer (50 % of the material) unaffected. An attractive method to increase the efficiency of those resolutions is to racemize the unaffected enantiomer. In the present work, we have developed a practical racemization protocol for tertiary alcohols. Five different
叔醇是天然产物中重要的结构基序,是有机合成中的重要组成部分,但对映选择性制备方法知之甚少。手性拆分是使一种对映异构体(占物质的50%)不受影响的方法之一。提高这些拆分效率的一种有吸引力的方法是消旋未受影响的对映异构体。在目前的工作中,我们已经开发出一种实用的叔醇消旋方案。测试了五种不同的酸性树脂材料。Dowex 50WX8是首选树脂,因为它能够与叔醇消旋而不会形成任何副产物。研究了合适的溶剂和双相体系,优化的体系能够使不同取代的叔醇外消旋。