Direct coupling of alcohols with alkenylsilanes catalyzed by indium trichloride or bismuth tribromide
作者:Yoshihiro Nishimoto、Masayuki Kajioka、Takahiro Saito、Makoto Yasuda、Akio Baba
DOI:10.1039/b816072d
日期:——
Indium halides or bismuth halides catalyzed the coupling of various alcohols with alkenylsilanes to give the corresponding alkenes stereospecifically without any other activators.
Copper(I) Catalyzed Differential Peroxidation of Terminal and Internal Alkenes Using TBHP
作者:Bilal Ahmad Mir、Suresh Rajamanickam、Pakiza Begum、Bhisma K. Patel
DOI:10.1002/ejoc.201901689
日期:2020.1.16
A TBHP mediated carbonylation–peroxidation of styrene, α‐peroxidation of α‐substituted unsymmetrical internalalkenes and concurrent peroxidation–carbonylation–cycloalkylation/cycloetherifiction of internal cyclic alkene (indene) have been developed.
We herein report a transition-metal-free cross-coupling between secondaryalkylhalides/mesylates and aryl/alkenylboronic acid, providing expedited access to a series of nonchiral/chiral coupling products in moderate to good yields. Stereospecific SN2-type coupling is developed for the first time with alkenylboronic acids as pure nucleophiles, offering an attractive alternative to the stereospecific
sp3-sp2 C-C Bond Formation via Brønsted Acid Trifluoromethanesulfonic Acid-Catalyzed Direct Coupling Reaction of Alcohols and Alkenes
作者:Hui-Lan Yue、Wei Wei、Ming-Ming Li、Yong-Rong Yang、Jian-Xin Ji
DOI:10.1002/adsc.201100262
日期:2011.11
A novel and efficient trifluoromethanesulfonic acid-catalyzed sp3-sp2 CC bond formation reaction through the direct coupling of alcohols with alkenes has been realized under mild conditions. The present protocol provides an attractive approach to a diverse range of polysubstituted olefins in good to excellent yields with high stereo- and regioselectivities.
Acidic ionic liquid was used as a metal-free and recyclable catalyst for the synthesis of polysubstitutedolefins by activating of ethers in dimethyl carbonate as a green solvent. Density functional theory (DFT) calculations showed a hydrogen bonding effect during the reaction.