Several 2-(benzylsulfonyl)tropones were thermolized to give 2- and 4-benzyltropones. The radical mechanism for the thermolysis was elucidated by a deuterium-labelling experiment.
Synthetic Photochemistry. XXXIX. Sensitized-Photooxygenation of 2-Benzyltropone, 2-[Hydroxy(4-nitrophenyl)methyl]tropone, and 2-(1-Hydroxy-2-oxo-2-phenylethyl)tropone. A Quenching Effect of Hydroxyl Group in the Vicinity of the Reaction Site
作者:Akira Mori、Hiroshi Suizu、Hitoshi Takeshita
DOI:10.1246/bcsj.60.3817
日期:1987.10
Singlet-oxygen oxidation of 2-[hydroxy(4-nitrophenyl)methyl]tropone gave 6,7-dioxabicyclo[3.2.2]nona-3,8-dien-2-one derivatives in good yields. A change of regioselectivity of the oxygenation with a remarkable rate of enhancement (23 times) in deuteriomethanol vs. methanol could be best explained in terms of the quenching of singlet oxygen by the free hydroxyl group in the vicinity of the reaction
Access to 2-Alkyltropones via Organic Base-Catalyzed Tandem Deamination and Aldol Condensation of Tropinone-Derived Quaternary Ammonium Salts
作者:Yan Wang、Qian-Qian Wu、Shi-Kai Tian
DOI:10.1021/acs.joc.3c01983
日期:2023.12.1
The tropone skeleton exists in a number of natural products and bioactive substances, and currently, the applications of substituted tropones are significantly limited by their preparative methods. Herein, we report a very convenient method to access 2-alkyltropones via organic base-catalyzed tandem reaction of tropinone-derived quaternary ammonium salts. Tropinone methiodide reacted with a wide variety