A new methodology is described herein which converts simple and readily accesible furan substrates into complex enantio-enriched carbocyclic skeletons through the implementation of a simple one-pot procedure. Singlet oxygen furan photoxygenation affords an enedione which then participates in an organocatalysed double-Michael reaction with an enal to furnish a cyclopentanone structure with up to four
本文描述了一种新的方法,该方法通过实施简单的一锅法将简单且易于获得的
呋喃底物转化为富含对映体的碳环骨架。单线态氧
呋喃光合反应可制得烯二酮,该烯酮随后与烯类参与有机催化的双迈克尔反应,从而为
环戊酮结构提供多达四个新的连续立体中心。该过程的对映选择性和非对映选择性均优异。如果需要,可以在级联反应序列上附加其他的羟醛环化步骤,以提供关键的对映纯的氢化
茚基序。