Enantioselective Pd(II)-Catalyzed Intramolecular Oxidative 6-<i>endo</i> Aminoacetoxylation of Unactivated Alkenes
作者:Xiaoxu Qi、Chaohuang Chen、Chuanqi Hou、Liang Fu、Pinhong Chen、Guosheng Liu
DOI:10.1021/jacs.8b03767
日期:2018.6.20
A novel asymmetric 6-endo aminoacetoxylation of unactivatedalkenes by palladium catalysis, which yields chiral β-acetoxylated piperidines with excellent chemo-, regio- and enantioselectivities under very mild reaction conditions, has been established herein by employing a new designed pyridine-oxazoline (Pyox) ligand. Importantly, introducing a sterically bulky group into the C-6 position of Pyox
Palladium(II)‐Catalyzed Enantioselective Azidation of Unactivated Alkenes
作者:Xiaonan Li、Xiaoxu Qi、Chuanqi Hou、Pinhong Chen、Guosheng Liu
DOI:10.1002/anie.202006757
日期:2020.9.21
of unactivated alkenes has been established by using readily accessible 1‐azido‐1,2‐benziodoxol‐3(1H)‐one (ABX) as an azidating reagent, which affords a wide variety of structurally diverse 3‐N3‐substituted piperidines in good yields with excellent enantioselectivity. The reaction features good functional‐group compatibility and mild reaction conditions. Notably, both an electrophilic azidating reagent
Highly Selective Palladium-Catalyzed Intramolecular Aminonitroxylation of Alkenes
作者:Guosheng Liu、Shujun Chen、Tao Wu、Xingliang Zhen
DOI:10.1055/s-0030-1259701
日期:2011.4
A palladium-catalyzedintramolecular oxidative aminonitroxylationof unactivated alkenes, in which AgNO 3 functioned as amild nitrate reagent in the presence of PhI(OAc) 2 , hasbeen developed. Mechanistic studies suggest that this selectiveaminonitroxylation reaction likely resulted from a new oxidant PhI(ONO 2 ) 2 generatedin situ from AgNO 3 and PhI(OAc) 2 .