The polymeric quaternary ammonium salt supported on silica gel as catalyst for the efficient synthesis of cyclic carbonate

2014 ◽  
Vol 6 ◽  
pp. 62-68 ◽  
Author(s):  
Baoning Song ◽  
Li Guo ◽  
Ran Zhang ◽  
Xiuge Zhao ◽  
Huimei Gan ◽  
...  
Keyword(s):  
Silica Gel ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Cyclic Carbonate ◽  
Efficient Synthesis

Quaternary ammonium salt grafted nanoporous covalent organic polymer for atmospheric CO2 fixation and cyclic carbonate formation

2020 ◽  
Vol 356 ◽  
pp. 527-534
Author(s):  
Doyun Kim ◽  
Saravanan Subramanian ◽  
Damien Thirion ◽  
Youngdong Song ◽  
Aqil Jamal ◽  
...  
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Co2 Fixation ◽  
Cyclic Carbonate ◽  
Atmospheric Co2 ◽  
Organic Polymer ◽  
Carbonate Formation

The Guareschi–Thorpe Cyclization Revisited – An Efficient Synthesis of Substituted 2,6-Dihydroxypyridines and 2,6-Dichloropyridines

Synlett ◽  
2018 ◽  
Vol 29 (11) ◽  
pp. 1455-1460 ◽  
Author(s):  
Magnus Eriksson ◽  
Xingzhong Zeng ◽  
Jinghua Xu ◽  
Diana Reeves ◽  
Carl Busacca ◽  
...  
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Efficient Synthesis ◽  
Keto Esters ◽  
High Yields

DBU as base is key in a practical modified Guareschi–Thorpe cyclization of β-keto esters and 2-cyanoacetamide to allow the synthesis of substituted pyridones in good to excellent yields. The chlorination of DBU salts of pyridones with POCl3 in the presence of a quaternary ammonium salt under standard atmospheric reflux conditions as opposed to the typical pressure equipment led to high yields of substituted 2,6-dichloropyridines.

An aluminum porphyrin complex with high activity and selectivity for cyclic carbonate synthesis

2015 ◽  
Vol 17 (5) ◽  
pp. 2853-2858 ◽  
Author(s):  
Yusheng Qin ◽  
Hongchen Guo ◽  
Xingfeng Sheng ◽  
Xianhong Wang ◽  
Fosong Wang
Keyword(s):  
High Activity ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Cyclic Carbonate ◽  
Cyclic Carbonates ◽  
Porphyrin Complex

A carefully designed aluminum porphyrin complex with a quaternary ammonium salt cocatalyst exhibits high activity and selectivity for cyclic carbonates synthesis.

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