50986-90-8Relevant academic research and scientific papers
One-Pot Sulfoxide Synthesis Exploiting a Sulfinyl-Dication Equivalent Generated from a DABSO/Trimethylsilyl Chloride Sequence
Lenstra, Danny C.,Vedovato, Vincent,Ferrer Flegeau, Emmanuel,Maydom, Jonathan,Willis, Michael C.
, p. 2086 - 2089 (2016)
A one-pot process for the synthesis of unsymmetrical sulfoxides using organometallic nucleophiles is described. Sulfur dioxide, delivered from the surrogate DABSO (DABCO-bis(sulfur dioxide)), acts as the initial electrophile and combines with the first organometallic reagent to generate a sulfinate intermediate. In situ conversion of the sulfinate to a sulfinate silyl ester, using TMS-Cl (trimethylsilyl chloride), generates a second electrophile, allowing addition of a second organometallic reagent. Organolithium or Grignard reagents can be employed, delivering sulfoxides in good to excellent yields.
Transition-Metal-Free Arylations of In-Situ Generated Sulfenates with Diaryliodonium Salts
Yu, Hao,Li, Zhen,Bolm, Carsten
supporting information, p. 7104 - 7106 (2018/11/23)
A transition-metal-free arylation of sulfenate anions generated from β-sulfinyl esters with diaryliodonium salts was developed. In this process, a new C-S bond is formed under mild reaction conditions providing a wide range of S,S-diaryl and S-alkyl S-aryl sulfoxides.
Preparation process of fluorine substituted aromatic compound
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, (2008/06/13)
A preparation process of a fluorine substituted aromatic compound comprising reacting an alkali metal or alkali earth metal salt of an aromatic compound having a hydroxy group with an organic fluorinating agent is disclosed. As a representative fluorinating agent, a bis-dialkylamino-difluoromethane compound, for example, 2,2′-difluoro-1,3-dimethylimidazolidine, is exemplified. According to the process, an industrially useful fluorinated aromatic compound, for example, a fluorobenzene, a fluorine substituted benzophenone, a fluorine substituted diarylsulfone can be prepared with ease in economy without specific equipment.
Reaction of Simple Arenes with FSO3H*SbF5/SO2: One-Pot Synthesis of Aromatic Sulfoxides. Mechanistic Aspects and Synthetic Utility
Laali, Kenneth Khosrow,Nagvekar, Devdatt S.
, p. 1867 - 1874 (2007/10/02)
In a simple one-pot reaction, mono-, di-, tri-, and polyalkylbenzenes, isomeric alkylhalobenzenes, and fluoro-, (trifluoromethyl)-, and 1,3,5-trifluorobenzene were converted to their corresponding diaryl sulfoxides with FSO3H*SbF5 (1:1) (magic acid)/SO2.Dependency of the yields on the acidity (H0) and the arene structure was demonstrated.Reduction of the formed sulfoxide was also observed as a minor pathway to give diaryl sulfide.The reduction is superacid-catalyzed, and protonated sulfoxides are the key intermediates en route to sulfides.Protonation of several functionalized diaryl sulfoxides was also studied in magic acid/SO2 under stable ion conditions.Unlike the parent diphenyl sulfoxide, which is S-protonated, alkyl-, fluoro-, and trifluoromethyl-substituted diaryl sulfoxides O-protonate to give long-lived sulfoxonium ions.The proposed mechanism for the arene/superacid/SO2 system involves sulfination of the arenium ions, O-protonation of the resulting sulfinic acid, dehydration of the oxonium ion "ArSO+" and arylation.In the absence of SO2, the fluorosulfonation, ionization, arylation path becomes dominant.The scope of the reaction is sufficiently broad to be synthetically useful.The methodology is also applicable to unsymmetrical (mixed) diaryl sulfoxides.
