Efficient syntheses of enantiomerically pure cyclopentadienes which undergo stereoselective and regioselective high pressure cycloadditions with nonsymmetric dienophiles are reported. As these compounds show a quite high chemical as well as thermal stability they are useful as templates in the generation of pure enantiomers by diastereoselective adduct transformation and subsequent retro-Diels-Alder reaction.
本研究报道了对映体纯度较高的
环戊二烯化合物的高效合成,这些化合物与非对称性亲二烯化合物发生了立体选择性和区域选择性高压环加成反应。由于这些化合物具有很高的
化学稳定性和热稳定性,因此它们可以作为模板,通过非对映选择性加成转化和随后的逆狄尔斯-阿尔德反应生成纯对映异构体。