Tritylium assisted iodine catalysis for the synthesis of unsymmetrical triarylmethanes
作者:Thibaut Courant、Marine Lombard、Dina V. Boyarskaya、Luc Neuville、Géraldine Masson
DOI:10.1039/d0ob01502d
日期:——
The combined Lewis acid catalytic system, generated from molecular iodine and tritylium tetrafluoroborate effectively catalyzed the Friedel–Crafts (FC) arylation of diarylmethyl sulfides providing an efficient access to various unsymmetrical triarylmethanes. The addition of tritylium and iodine created a more active catalytic system to promote the cleavage of sulfidic C–S bonds.
Action des organo-magnesiens sur la thiobenzophenone
作者:M. Dagonneau、J. Vialle
DOI:10.1016/s0040-4020(01)97563-5
日期:1974.1
Grignard reagents react with thiobenzophenone to give mainly the compound resulting from addition of the' organic radical to the sulfur atom. Addition to carbon, double addition both to sulfur and to carbon, and formation of tetraphenylthiiranne are also observed. The stable alkylthiodiphenylmethyl radical has been detected in the reaction medium. A mechanism is proposed to account for the various
Palladium-Catalyzed Direct α-Arylation of Benzyl Thioethers with Aryl Bromides
作者:Gustavo Frensch、Nusrah Hussain、Francisco A. Marques、Patrick J. Walsh
DOI:10.1002/adsc.201400679
日期:2014.8.11
diversity. A novel and efficient palladium-catalyzed direct sp3 C-H arylation of aryl and alkyl benzyl thioether derivatives with aryl bromides is reported. The reaction involves reversible deprotonation of the benzylic C-H's of the thioether with either LiN(SiMe3)2 or NaN(SiMe3)2 and subsequent cross-coupling to provide the functionalized products in up to 97% yield. A screen of 24 of the most successful