Process for the production of fluorinated organic compounds and fluorinating agents
申请人:——
公开号:US20030176747A1
公开(公告)日:2003-09-18
A process for the production of a fluorinated organic compound, characterized by fluorinating an organic compound having a hydrogen atoms using IF
5
; and a novel fluorination process for fluorinating an organic compound having a hydrogen atoms by using a fluorinating agent containing IF
5
and at least one member selected from the group consisting of acids, bases, salts and additives.
When Ethyl Is Infinitely Different from Methyl: Double Addition of Lithiated Dithianes to Aromatic Carboxylates Revisited
作者:Roman A. Valiulin、Rudresha Kottani、Andrei G. Kutateladze
DOI:10.1021/jo060780f
日期:2006.6.1
benzoate does not produce the expected product of double addition, α,α-bis(alkyldithianyl) benzyl alcohol, for alkyls larger than methyl. Instead, the first step intermediate, i.e. 2-benzoylated dithiane, undergoes an electron-transfer reduction by the second molecule of the dithianyl anion. This reduction is followed by the ring-opening mesolytic fragmentation of the dithiane ring in the ketyl anion radical
An effective and mild electrocatalytic procedure for the removal of 1,3-dithiane protecting groups
作者:Martin Platen、Eberhard Stekhan
DOI:10.1016/s0040-4039(01)85541-6
日期:1980.1
The 1,3-dithiane protectinggroup can effectively be removed by indirect electrochemical oxidation under extremely mild conditions, if catalytic amounts of tris(p-tolyl)amine are used as homogeneous electron transfer agents.
Photoinduced Signal Amplification through Controlled Externally Sensitized Fragmentation in Masked Sensitizers
作者:Rudresha Kottani、Janaki R. R. Majjigapu、Alexei Kurchan、Kavitha Majjigapu、Tiffany P. Gustafson、Andrei G. Kutateladze
DOI:10.1021/ja066692u
日期:2006.11.1
conjugation between the two aromatic moieties, effectively masking the sensitizer. A novel photoamplification strategy is developed based on photosensitized cleavage in such adducts, where each fragmentation event releases more diaryl ketone, capable of sensitization. As a result, mass release of dithianes, triggered with a very small amount of the initiator, is observed. Such amplified release can
New bis(acylsilanes) 17-19 bearing silicon atoms in an internal position were synthesized via silylation of 2-lithio-2-substituted-1,3-dithianes with bis(chlorinated) disilane 10 or siloxanes 11, 12. The dethioketalization of bis(dithianes) intermediates was performed using iodine and calcium carbonate. The method was efficient and general for linear and substituted alkyl chain derivatives but gave