Stereospecific Synthesis of β<sup>3</sup>-Amino Acid Derivatives from Propargylic Alcohols: Efficient Solution-Phase Synthesis of Oligopeptides without Coupling Agents
作者:Andrea Temperini、Raffaella Terlizzi、Lorenzo Testaferri、Marcello Tiecco
DOI:10.1002/chem.200900701
日期:2009.8.10
A stereospecific synthesis of β3‐amino acids has been accomplished starting from readily available and enantioenriched propargylic alcohols. This conversion can be effected in only three steps by selenium‐mediated organic transformations of the carbon–carbon triple bond. This method is especially attractive because the reactive Se‐phenyl selenocarboxylate intermediates can be trapped with the amine
β3-氨基酸的立体定向合成已经从容易获得的和对映体富集的炔丙醇开始。通过硒介导的碳-碳三键有机转化,这种转化只需三个步骤即可实现。这种方法特别有吸引力,因为反应性硒基羧酸硒苯基酯中间体可以被氨基酸衍生物的胺官能团捕获。通过这种策略,N 末端的链伸长已经受到影响。在不使用偶联剂的情况下,N-去保护和与其他硒-苯基硒代羧酸盐中间体的重复同源化产生了 β-和混合 α/β-寡肽。