作者:Bao, Ming、Zhou, Yi、Yuan, Haoxuan、Dong, Guizhi、Li, Chao、Xie, Xiongda、Chen, Kewei、Hong, Kemiao、Yu, Zhi-Xiang、Xu, Xinfang
DOI:10.1002/anie.202401557
日期:——
An enantioselective (4+2) annulation of N-propargylamides and α,β-unsaturated imines/ketones has been accomplished under gold-complex and chiral quinine-derived squaramide synergetic catalysis, providing chiral tetrahydropyridines/dihydropyrans with high efficiency and selectivity. This method complements the (4+2) annulation of allene reagents via a formal cycloaddition on internal π-bond, which is
在金配合物和手性奎宁衍生的方酰胺协同催化下,完成了N-炔丙基酰胺和α,β-不饱和亚胺/酮的对映选择性(4+2)环化,提供了高效、选择性的手性四氢吡啶/二氢吡喃。该方法通过内部 π-键上的正式环加成补充了丙二烯试剂的 (4+2) 环化,这具有挑战性并且仍然难以捉摸。