Synthesis of Highly Substituted Arenes via Cyclohexadiene–Alkene C–H Cross Coupling and Aromatization
作者:Anup Bhunia、Armido Studer
DOI:10.1021/acscatal.8b00083
日期:2018.2.2
The development of a cross-coupling method for the regioselective β-alkenylation of 2,5-cyclohexadiene carboxylic acid derivatives to form ortho-alkenylarenes through in situ decarboxylation and aromatization is described. The carboxylic acid functionality is used as a traceless directing group for efficient and mild β-alkenylation. The modular sequence comprises a reductive Birch α-alkylation, ionic
Decarbonylative Transfer Hydrochlorination of Alkenes and Alkynes Based on a B(C
<sub>6</sub>
F
<sub>5</sub>
)
<sub>3</sub>
‐Initiated Grob Fragmentation
作者:Kaixue Xie、Martin Oestreich
DOI:10.1002/anie.202203692
日期:2022.6.13
fragmentation of cyclohexa-2,5-dien-1-yl-substituted acyl chlorides into a low-molecular-weight arene, carbon monoxide and HCl. In the presence of π-basic substrates such as alkenes and alkynes, HCl is transferred stepwise to afford the corresponding hydrochlorination products. The overall reaction is a decarbonylative transfer hydrochlorination driven by aromatization and carbon-monoxide release.
Dehydrative Coupling of 1,1-Diarylalkenes and Cyclohexa-2,5-diene-1-carbaldehyde Derivatives Induced by a B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Initiated [1,2]-Alkyl Migration
作者:Kaixue Xie、Sebastian Kemper、Martin Oestreich
DOI:10.1021/acs.joc.3c00966
日期:2023.7.21
Regioselective Arene Functionalization: Simple Substitution of Carboxylate by Alkyl Groups
作者:Tobias Krüger、Katja Vorndran、Torsten Linker
DOI:10.1002/chem.200901774
日期:2009.11.9
from toluic and naphthoic acids, the carboxylate group was conveniently substituted by alkyl halides by Birch reduction and subsequent decarbonylation. The method is characterized by inexpensive starting materials and reagents, and methylation of arenes was realized. Besides simple alkyl substituents, the scope of arene functionalization was extended by benzyl, fluoro, amino, and ester groups. We were