Palladium-Catalyzed Enantioselective C(sp<sup>3</sup>)–H/C(sp<sup>3</sup>)–H Umpolung Coupling of <i>N</i>-Allylimine and α-Aryl Ketones
作者:Tian-Ci Wang、Ling Zhu、Shiwei Luo、Zhong-Sheng Nong、Pu-Sheng Wang、Liu-Zhu Gong
DOI:10.1021/jacs.1c10721
日期:2021.12.8
tolerated to open a convenient and tunable avenue for efficient synthesis of enantioenriched β-amino-γ,δ-unsaturated carbonyl derivatives with high levels of regio- and stereoselectivities, capable of providing a key intermediate for asymmetric synthesis of Focalin. This protocol showcases an umpolung reactivity of the N-allylimines through a concerted proton and two-electron transfer process to cleave
Asymmetric Allylic C–H Alkylation of Allyl Ethers with 2-Acylimidazoles
作者:Tian-Ci Wang、Lian-Feng Fan、Yang Shen、Pu-Sheng Wang、Liu-Zhu Gong
DOI:10.1021/jacs.9b05247
日期:2019.7.10
An asymmetricallylic C-H alkylation of allyl ethers has been established by chiral phosphoramidite-palladium catalysis, affording a wide variety of functionalized chiral 2-acylimidazoles in moderate to high yields and with high levels of enantioselectivity. Moreover, this protocol could be applied to a concise asymmetric synthesis of a tachykinin receptor antagonist.
Enantioselective Conjugate Addition of 2-Acylimidazoles with Nitroalkenes Promoted by Chiral-at-Metal Rhodium(III) Complexes
作者:Ganesh Kumar Thota、Gui-Jun Sun、Tao Deng、Yi Li、Qiang Kang
DOI:10.1002/adsc.201701377
日期:2018.3.20
An enantioselective conjugate addition of 2‐acylimidazoles with nitroalkenes catalyzed by chiral‐at‐metal rhodium(III) complex under mild reaction conditions was developed, affording versatile γ‐nitro ketone skeletons in good yields with excellent enantioselectivities (up to >99% ee).
Octahedral iridium complex catalyzed α-chlorination of 2-acyl imidazoles with tosyl chloride
作者:Tao Deng、Pranjal P. Bora、Shao-Xia Lin、Yi Li、Qiang Kang
DOI:10.1016/j.tetlet.2017.01.078
日期:2017.3
An efficient and catalytic α-chlorination of 2-acyl imidazoles with readily available tosyl chloride catalyzed by an octahedral iridiumcomplex under mild condition was reported. A range of 2-acyl imidazoles were converted to their corresponding α-chlorination products in good to excellent yields.