28683-44-5Relevant articles and documents
The catalytic effect of anion-exchanged supported ionic liquid on aza-Michael-type addition
Ghasemi, Mohammad Hadi,Kowsari, Elaheh
, p. 3691 - 3709 (2017/06/20)
Abstract: An effective synthesis of anion-exchanged supported ionic liquids using diatomaceous earth as solid support and its catalytic effect on the aza-Michael-type addition is described. Anionic polytungstophosphate and bisulfate ion are used in the anion-exchange step in catalyst design. In addition, the aza-Michael-type addition of various amines to 2- and 4-vinyl pyridine was examined in this article. The catalytic system can be separated from the reaction mixture and recycled in subsequent reactions. The structure of anion-exchanged supported ionic liquid on diatomaceous earth was studied by XRD, FT-IR, SEM, TGA and BET techniques. The structure of organic products was determined by 1HNMR, 13CNMR, FTIR, CHN and MASS spectroscopy. Graphical Abstract: [Figure not available: see fulltext.].
2-(4-Pyridyl)ethyl as a Protective Group for Sulfur Functionality
Katritzky, Alan R.,Takahashi, Ichiro,Marson, Charles M.
, p. 4914 - 4920 (2007/10/02)
2-(4-Pyridyl)ethyl sulfides have been prepared from a variety of alkyl and aryl thiols and from alkyl and acyl halides.These sulfides and their corresponding sulfoxides and sulfones were each depyridylethylated by quaternization and subsequent treatment with mild base to give respectively the thiols, sulfenic acids, sulfinic acids, and sulfenamides.During one of these protection-deprotection sequences, methyl 1-octyl sulfoxide was readily converted by aerial oxidation into the corresponding sulfone.