Traceless Rhodium-Catalyzed Hydroacylation Using Alkyl Aldehydes: The Enantioselective Synthesis of β-Aryl Ketones
作者:Anaïs Bouisseau、Ming Gao、Michael C. Willis
DOI:10.1002/chem.201604035
日期:2016.10.24
A one‐pot three‐step sequence involving Rh‐catalyzed alkene hydroacylation, sulfide elimination and Rh‐catalyzed aryl boronic acid conjugate addition gave products of traceless chelation‐controlled hydroacylation employing alkyl aldehydes. The stereodefined β‐aryl ketones were obtained in good yields with excellent control of enantioselectivity. Good variation of all three reaction components is possible
Metal-free and highly regioselective synthesis of N-heteroaryl substituted pyrazoles from α,β-unsaturated N-tosylhydrazones and heteroaryl chlorides
作者:Lin Zeng、Xiao-Qiang Guo、Zai-Jun Yang、Ya Gan、Lian-Mei Chen、Tai-Ran Kang
DOI:10.1016/j.tetlet.2019.07.034
日期:2019.8
β-unsaturated N-tosylhydrazones with N-heteroaryl chlorides was developed for the synthesis of N-heteroaryl pyrazole derivatives. This one-pot reaction provided bi(heteroaryl) derivatives in good to excellent yields and with excellent regioselectivity. The procedure is operationally simple and applicable to large-scale synthesis.
N-Heterocyclic Carbene-Catalyzed Enantioselective β-Amination of α-Bromoenals Enabled by a Proton-Shuttling Strategy
作者:Ming Lang、Jian Wang
DOI:10.1002/ejoc.201800648
日期:2018.6.22
An enantioselective NHC‐catalyzed β‐amination of α‐bromoenals has been established. This [4+3] annulation protocol allows the rapid assembly of 1,5‐benzodiazepine pharmacophores from simple and readily available starting materials under mild conditions.
Organocatalytic Enantioselective Cross-Vinylogous Rauhut-Currier Reaction of Methyl Coumalate with Enals
作者:Qiwen Liu、Liansuo Zu
DOI:10.1002/anie.201805019
日期:2018.7.20
The organocatalytic enantioselective intermolecular cross‐vinylogous Rauhut–Currier (RC) reaction of methyl coumalate with α,β‐unsaturated aldehydes is reported, and the enals are activated by iminium catalysis to serve as the Michael acceptors and methyl coumalate is used as an activated diene to generate a latent enolate. The excellent selectivity is driven by the aromaticity of methyl coumalate
Highly Enantioselective Synthesis of Functionalized Glutarimide Using Oxidative N-Heterocyclic Carbene Catalysis: A Formal Synthesis of (−)-Paroxetine
作者:Arka Porey、Surojit Santra、Joyram Guin
DOI:10.1021/acs.joc.9b00320
日期:2019.5.3
yet highly effective approach toward enantioselective synthesis of trans-3,4-disubstituted glutarimides from readily available starting materials is developed using oxidative N-heterocyclic carbene catalysis. The catalytic reaction involves a formal [3 + 3] annulation between enals and substituted malonamides enabling the production of glutarimide derivatives in a single chemical operation via concomitant