Transmetalation of Alkylzirconocenes in Copper-Catalyzed Alkyl-Alkynyl Cross-Coupling Reactions
作者:Kiran Indukuri、Olivier Riant
DOI:10.1002/adsc.201700164
日期:2017.7.17
simple copper‐catalyzed alkyl–alkynyl cross‐coupling strategy has been developed using the reaction between alkynyl bromides and alkylzirconocenes. The alkylzirconocenes were generated in situ via regioselective addition of Schwartz's reagent (ZrCp2HCl) on to alkenes. The reaction has a broad scope, a range of functionalized bromoalkynes and alkylzirconium reagents were successfully coupled, resulting in
Synthesis of β-Dimethylsulfonium- and β-Methylthio-Substituted Vinyl Triflates by Reaction of Acetylenes with Dimethyl Sulfide Ditriflate
作者:Valentine G. Nenajdenko、Pavel V. Vertelezkij、Elizabeth S. Balenkova
DOI:10.1055/s-1997-1179
日期:1997.3
A one-pot synthesis of β-dimethylsulfonium-substituted vinyl triflates by the reaction of dimethyl sulfide ditriflate with acetylenes is described. β-Dimethylsulfonium-substituted vinyl triflates were found to exhibit unusual reactivity towards nucleophiles resulting in demethylation of sulfonium salts, but not substitution of triflate. Demethylation of these sulfonium salts with diethylamine gave the corresponding β-methylthio-substituted vinyl triflates. The possibility of thiophene derivative synthesis via triflic anhydride promoted cyclization of sulfoxide was studied.