对映选择合成
对称化
杯芳烃
芴
钯
化学
催化作用
分子内力
组合化学
配体(生物化学)
立体化学
有机化学
分子
聚合物
受体
生物化学
作者
Xin Zhang,Shuo Tong,Jieping Zhu,Mei‐Xiang Wang
出处
期刊:Chemical Science
[The Royal Society of Chemistry]
日期:2023-01-01
卷期号:14 (4): 827-832
被引量:21
摘要
Under the catalysis of PdBr2 and a chiral phosphoramidite ligand, the upper-rim mono (2-bromoaroyl)-substituted calix[4]arene derivatives underwent a facile enantioselective desymmetrization reaction to afford 9H-fluorene-embedded inherently chiral calixarenes in good yields with excellent enantioselectivities. The transannular dehydrogenative arene-arene coupling reaction proceeded most probably through an oxidative addition of the Caryl-Br bond to a ligated palladium catalyst followed by a sequence of an enantioselective 1,5-palladium migration and an intramolecular C-H arylation sequence. This new family of inherently chiral calixarenes possesses unique chiroptical properties thanks to their highly rigid structure induced by the 9H-fluorene segment.
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