Herein, we report a highly diastereo- and enantioselective allylic alkylation of oxazolones with 1,3-dienes by palladium-hydride catalyst under base-free conditions. With DTBM-SEGPHOS as the chiral ligand, a series of enantioenriched oxazolones bearing tertiary carbon centers were synthesized from substituted 1,3-dienes via exclusive 1,2-addition with moderate to good diastereoselectivities and high
在此,我们报道了在无碱条件下,
钯氢化物催化的1,3-二烯与
恶唑酮的非对映体和对映体选择性烯丙基烷基化。以DTBM-
SEGPHOS为手性
配体,由取代的1,3-二烯经专门的1,2-加成,由中等至良好的非对映选择性和高对映选择性合成了一系列带有叔碳中心的对映体富集的
恶唑酮。当在这种无碱催化体系下,简单的
1,3-丁二烯用作烯丙基前体时,可以高产率获得具有高区域选择性的1,4-加成产物。