Direct and selective synthesis of 3-arylphthalides via nickel-catalyzed aryl addition/intramolecular esterification
作者:Qing Qiang、Feipeng Liu、Zi-Qiang Rong
DOI:10.1016/j.tet.2021.132162
日期:2021.6
Herein we report a nickel-catalyzed aryl addition/intramolecular esterification in a cascade fashion. Under the combination of commercially available nickel precursor and tridentate ligand, the one pot protocol offers a direct, simple and regioselective approach to access 3-aryl phthalide derivatives from two readily available substrates with good efficiency, broad scope as well as satisfactory functional
Enantiodivergent Atroposelective Synthesis of Chiral Biaryls by Asymmetric Transfer Hydrogenation: Chiral Phosphoric Acid Catalyzed Dynamic Kinetic Resolution
作者:Keiji Mori、Tsubasa Itakura、Takahiko Akiyama
DOI:10.1002/anie.201606063
日期:2016.9.12
enantiodivergent synthesis of chiral biaryls by a chiral phosphoric acid catalyzedasymmetrictransferhydrogenation reaction. Upon treatment of biaryl lactols with aromatic amines and a Hantzsch ester in the presence of chiral phosphoric acid, dynamic kinetic resolution (DKR) involving a reductive amination reaction proceeded smoothly to furnish both R and S isomers of chiral biaryls with excellent enantioselectivities
Catalytic Enantioselective Birch–Heck Sequence for the Synthesis of Tricyclic Structures with All-Carbon Quaternary Stereocenters
作者:Andrew T. Krasley、William P. Malachowski、Hannah M. Terz、Sabrina Tran Tien
DOI:10.1021/acs.orglett.8b00196
日期:2018.4.6
A new enantioselectivedesymmetrizing Mizoroki–Heck reaction is reported. The process affords high yields and enantioselectivities of tricyclic structures containing all-carbon quaternary stereocenters. The substrates for the reaction are efficiently synthesized from Birch reduction–alkylation of benzoic acid and benzoate esters.
Divergent Reaction of Isocyanides with <i>o</i>-Bromobenzaldehydes: Synthesis of Ketenimines and Lactams with Isoindolinone Cores
作者:Yi-Ming Zhu、Yizhan Fang、Haiyan Li、Xiao-Ping Xu、Shun-Jun Ji
DOI:10.1021/acs.orglett.1c02422
日期:2021.10.1
A divergent reaction of isocyanides with o-bromobenzaldehydes for the synthesis of isoindolinone-derived ketenimines and lactams was disclosed. The reaction features readily available reactants, relatively mild conditions, and high yields of products. Ketenimines could be applied in further transformations for access to other functional molecules. A mechanism study showed that the palladium-migration/imine-insertion
Gold(I)-Catalyzed Synthesis of Benzoxocines by an 8-endo-dig Cyclization
作者:Kathrin Wittstein、Kamal Kumar、Herbert Waldmann
DOI:10.1002/anie.201103832
日期:2011.9.19
A golden dig! Gold‐catalyzed direct access to functionalized 2H‐1‐benzoxocines, eight‐membered‐ring ethers, is described. This unprecedented synthesis of benzoxocines occurs by an 8‐endo‐dig cyclization of the 1,7‐enyne substrates.
挖金!描述了金催化直接接触官能化的2 H -1-苯并氧杂庚酮,八元环醚。苯并恶臭酮的这种空前的合成是通过对1,7-烯炔底物进行8内消旋环化而实现的。