申请人:The Scripps Research Institute
公开号:US20190315710A1
公开(公告)日:2019-10-17
Chiral acetyl-protected aminoethyl quinoline (APAQ), pyridine and imazoline ligands are disclosed that enable Pd (II)-catalyzed enantioselective arylation or heteroarylation of ubiquitous prochiral β-methylene C—H bonds of aliphatic amides offers an alternative disconnection for constructing β-chiral centers. Systematic tuning of the ligand structure reveals that a six-membered instead of a five-membered chelation of these types of ligands with the Pd(II) is important for accelerating the C(sp
3
)-H activation thereby achieving enantioselectivity for quinoline and pyridine ligands.
披露了手性乙酰保护氨基乙基喹啉(APAQ)、吡啶和咪唑啉配体,这些配体使Pd(II)催化的对丙烷酰胺的普遍的原始手性β-亚甲基C-H键进行对芳基或杂芳基化的不对称选择性取代反应成为可能,为构建β-手性中心提供了另一种断裂途径。通过系统调整配体结构发现,这些类型的配体与Pd(II)的六元环而不是五元环的螯合对于加速C(sp3)-H键的活化至关重要,从而实现喹啉和吡啶配体的对映选择性。