Cleavage of 1,3-Dithianes via Acid-Catalyzed Hydrolysis of the Corresponding 1,3-Dithianemonooxides
作者:Karsten Krohn、Stephan Cludius-Brandt
DOI:10.1055/s-2008-1067164
日期:2008.8
The hydrolysis of 1,3-dithianes to their parent carbonyl compounds via their corresponding monosulfoxides was systemati- cally investigated. The oxidation of the 1,3-dithianes was carried out in high yields using tert-butyl hydroperoxide. Acid-catalyzedhydrolysis of the monosulfoxides to the carbonyl compounds was then performed in excellent yields. The cleavage reactions were monitored by gas chromatography
Reversed-Polarity Synthesis of Diaryl Ketones through Palladium-Catalyzed Direct Arylation of 2-Aryl-1,3-dithianes
作者:Baris Yucel、Patrick J. Walsh
DOI:10.1002/adsc.201400695
日期:2014.11.24
resulting 2,2-diaryl-1,3-dithianes were converted into diaryl ketones by either molecular iodine, N-bromo succinimide (NBS) or Selectfluor in the presence of water. The dithiane arylation/hydrolysis can be performed in a one-pot procedure to yield a good to excellent yields. This method is suitable for rapid and large-scale synthesis of diaryl ketones. A one-pot preparation of anti-cholesterol drug fenofibrate
Anodic desulfurization of dithioacetals of ketones in the presence of Et3N·3HF provided the corresponding gem-difluorocompounds while dithioacetals of aromatic and aliphatic aldehydes gave gem-difluoro thioethers and monofluoro thioether, respectively.
Electrolytic partial fluorination of organic compounds. 20. Electrosynthesis of novel hypervalent iodobenzene chlorofluoride derivatives and its application to indirect anodic gem-difluorination
作者:Toshiyasu Fujita、Toshio Fuchigami
DOI:10.1016/0040-4039(96)00951-3
日期:1996.7
Electrosynthesis of novelhypervalentiodobenzenechlorofluorides was successfully performed for the first time and it was demonstrated that p-methoxyiodobenzene chlorofluoride could be used as a mediator for indirectanodicgem-difluorination of dithioacetals.
Electrolytic Partial Fluorination of Organic Compounds. 14. The First Electrosynthesis of Hypervalent Iodobenzene Difluoride Derivatives and Its Application to Indirect Anodic gem-Difluorination
作者:Toshio Fuchigami、Toshiyasu Fujita
DOI:10.1021/jo00103a003
日期:1994.12
The electrosynthesis of hypervalent iodobenzene difluorides was accomplished by anodic oxidation of p-nitro- and p-methoxyiodobenzenes with Et(3)N.3HF in anhydrous acetonitrile, and p-methoxyiodobenzene difluoride was used as a mediator for indirect anodic gem-difluorination of dithioketals.