Stereoselective and Diversity-Oriented Synthesis of Trisubstituted Allylic Alcohols and Amines
作者:Yvonne Schmidt、Bernhard Breit
DOI:10.1002/chem.201100844
日期:2011.10.10
reagent‐directing o‐DPPB group, copper‐mediated allylic substitution with a wide range of Grignard reagents enabled the stereoselective construction of a large number of E‐configured trisubstituted allylic alcohols and amines in excellent yields and stereoselectivities. Remarkable is the synthetic flexibility, which allows a wide range of permutations starting from an aldehyde followed by successive introduction
三取代烯烃的立体选择性和多样性取向合成是通过使用邻二苯基膦基苯甲酸苯酯(o- DPPB)作为烯丙基取代的指导基团来实现的。这种方法的出发点是衍生自Baylis-Hillman加合物的一组α-亚甲基醛。随后添加不同的有机金属试剂产生了多种烯丙基醇底物。引入试剂导向的o -DPPB基团后,用多种格氏试剂进行铜介导的烯丙基取代使多种E的立体选择性构建成为可能。预配置的三取代烯丙基醇和胺,具有出色的收率和立体选择性。显着的是合成柔性,其允许从醛开始的宽范围的排列,然后从有机金属格氏试剂连续引入取代基R 2和R 3。因此,仅从少数几种前体开始,就可以实现立体定向的三取代烯丙基醇和胺的多样化导向合成。