The catalytic effect of anion-exchanged supported ionic liquid on aza-Michael-type addition
作者:Mohammad Hadi Ghasemi、Elaheh Kowsari
DOI:10.1007/s11164-016-2840-0
日期:2017.7
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.
Catalyst-free anti-Markovnikov hydroamination and hydrothiolation of vinyl heteroarenes in aqueous medium: an improved process towards centhaquine
作者:Anamika Yadav、Mayur D. Ambule、Ajay Kumar Srivastava
DOI:10.1039/d3ob02046k
日期:——
Catalyst-free hydroamination and hydrothiolation of vinyl heteroarenes/electron deficient alkenes have been achieved in an aqueous medium.
在水介质中实现了乙烯基杂环烯/缺电子烯的无催化剂氢化和氢硫化。
2-(4-Pyridyl)ethyl as a protective group for sulfur functionality
作者:Alan R. Katritzky、Ichiro Takahashi、Charles M. Marson
DOI:10.1021/jo00375a029
日期:1986.12
The Pyridylethylation of Active Hydrogen Compounds. V. The Reaction of Ammonia, Certain Amines, Amides and Nitriles with 2- and 4-Vinylpyridine and 2-Methyl-5-vinylpyridine<sup>1</sup>