Successful Application of Indirect Electrooxidation for the Transformation of Biaryl Methanols to the Corresponding Biaryl Ketones
摘要:
Various biaryl methanols were electrooxidized into the corresponding biaryl ketones in good yields and under very mild reaction conditions. Because of the relatively high oxidation potential, bulky structure, and somewhat poor solubility, biaryl methanols do not readily undergo direct electrooxidative transformations as a synthetic step toward the corresponding biaryl ketones. Herein, we report the successful indirect electrooxidation of secondary biaryl methanols featuring the use of a slight excess amount of KI (1.2 equivalents, relative to the substrate) in MeOH.
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.
Visible-Light-Triggered C–C and C–N Bond Formation by C–S Bond Cleavage of Benzylic Thioethers
作者:Matteo Lanzi、Jérémy Merad、Dina V. Boyarskaya、Giovanni Maestri、Clémence Allain、Géraldine Masson
DOI:10.1021/acs.orglett.8b02196
日期:2018.9.7
The cleavage of sulfidic C–S bonds under visible-light irradiation was harnessed to generate carbocations under neutral conditions and synthesize valuable di- and triarylalkanes as well as benzyl amines. To this end, photoredox catalysis and direct photoinduced C–S bondcleavage are used as complementary approaches and participate in the versatility of the general strategy. Extensive mechanistic studies
Various biaryl methanols were electrooxidized into the corresponding biaryl ketones in good yields and under very mild reaction conditions. Because of the relatively high oxidation potential, bulky structure, and somewhat poor solubility, biaryl methanols do not readily undergo direct electrooxidative transformations as a synthetic step toward the corresponding biaryl ketones. Herein, we report the successful indirect electrooxidation of secondary biaryl methanols featuring the use of a slight excess amount of KI (1.2 equivalents, relative to the substrate) in MeOH.