129125-87-7Relevant articles and documents
Site-Selective C?H Oxygenation via Aryl Sulfonium Salts
Sang, Ruocheng,Korkis, Stamatis E.,Su, Wanqi,Ye, Fei,Engl, Pascal S.,Berger, Florian,Ritter, Tobias
supporting information, p. 16161 - 16166 (2019/11/03)
Herein, we report a two-step process forming arene C?O bonds in excellent site-selectivity at a late-stage. The C?O bond formation is achieved by selective introduction of a thianthrenium group, which is then converted into C?O bonds using photoredox chemistry. Electron-rich, -poor and -neutral arenes as well as complex drug-like small molecules are successfully transformed into both phenols and various ethers. The sequence differs conceptually from all previous arene oxygenation reactions in that oxygen functionality can be incorporated into complex small molecules at a late stage site-selectively, which has not been shown via aryl halides.
NONCONVENTIONAL FRIEDEL-CRAFTS CHEMISTRY III. ON THE REGIOSPECIFIC SYNTHESIS OF SPIRO-4'-ONE DERIVATIVES
El-Zohry, Maher F.
, p. 311 - 320 (2007/10/02)
The rection of 1-oxa-4-thiaspirononan-2-one (4) and/or 1-oxa-4-thiaspirodecan-2-one (5) with arenes (6) under the catalytic action of aluminum chloride afforded in all cases spiro-4'-ones (7a - g and 8a - g), -acetic acid, (9a - g and 10a - g), cycloalkylthioacetic acids, (11 and 20) aryl cycloalkyl sulfides, (14 and 23) diarylsulfides (15), diaryl disulfides and dicycloalkyl disulfides (13 and 22).The mechanisms of these reactions are discussed.Key words: Spiroisothiochroman-4-ones; Friedel-Crafts reactions.
