Electrochemical synthesis of methyl sulfoxides from thiophenols/thiols and dimethyl sulfoxide
作者:Ke-Si Du、Jing-Mei Huang
DOI:10.1039/c7gc03864j
日期:——
A new route for a one-pot synthesis of methyl sulfoxides from thiophenols/thiols and dimethyl sulfoxide using an electrochemical technique was developed. This protocol proceeded smoothly by employing electrons and hydrogen peroxide as clean oxidants, and a wide range of aromatic and aliphatic sulfoxides were synthesized in moderate to good yields.
Highly Enantioselective Oxidation of Sulfides to Sulfoxides by a New Oxaziridinium Salt
作者:R. E. del Río、B. Wang、S. Achab、L. Bohé
DOI:10.1021/ol0702573
日期:2007.6.1
The new oxaziridinium salt 5 (R2 = TBDPS) is an effective reagent for the highly enantioselective oxidation of sulfides to sulfoxides with up to >99% ee and good yields. As such, it represents a new valuable nonmetallic alternative to the existing methods for asymmetric sulfoxidation.
Para-selective borylation of monosubstituted benzenes using a transient mediator
作者:Jie Wu、Zengwei Wang、Xiao-Yue Chen、Yichen Wu、Daoming Wang、Qian Peng、Peng Wang
DOI:10.1007/s11426-019-9652-x
日期:2020.3
versatile sulfonium salt via highly electrophilic phenoxathiine or thianthrenedication intermediate which can be readily generated from its sulfoxide with tri-fluoromethanesulfonic anhydride. Preliminary mechanistic study implied that the remarkable para selectivity might be related to the incredible electrophilicity of thianthrenedication intermediate. The versatility of this approach was demonstrated
Unusual mechanisms in Claisen rearrangements: an ionic fragmentation leading to a <i>meta</i>-selective rearrangement
作者:Boris Maryasin、Dainis Kaldre、Renan Galaverna、Immo Klose、Stefan Ruider、Martina Drescher、Hanspeter Kählig、Leticia González、Marcos N. Eberlin、Igor D. Jurberg、Nuno Maulide
DOI:10.1039/c7sc04736c
日期:——
A mechanistic investigation of the acid-catalysed redox-neutral oxoarylation reaction of ynamides using electrospray ionisation mass-spectrometry (ESI-MS) and quantum chemical calculations (DFT and MP2) is presented. This study reveals the diversity of pathways and products available from an otherwise deceptively simple-looking, classical transformation: fragmentation, an unusual meta-arylation and