Methyl t-butyl ether decomposition in an inert membrane reactor composed of 12-tungstophosphoric acid catalyst and polyphenylene oxide membrane

1993 ◽  
Vol 77 (2-3) ◽  
pp. 287
Author(s):  
In Kyu Song ◽  
Wha Young Lee ◽  
Jae-Jin Kim
Keyword(s):  
Membrane Reactor ◽  
Acid Catalyst ◽  
Tungstophosphoric Acid ◽  
Butyl Ether ◽  
Polyphenylene Oxide ◽  
Oxide Membrane

Synthesis of fatty 1,2,4-trioxanes by peracetalisation of β-hydroxy hydroperoxides

Synthesis ◽  
2021 ◽  
Author(s):  
Thomas De Dios Miguel ◽  
Dan Louvel ◽  
Killian Onida ◽  
Adeline Lavoignat ◽  
Stephane Picot ◽  
...  
Keyword(s):  
Sulfonic Acid ◽  
Heterogeneous Catalysts ◽  
Antimalarial Activity ◽  
Acid Catalyst ◽  
Methyl Tert Butyl Ether ◽  
Significant Activity ◽  
Butyl Ether ◽  
Aliphatic Aldehydes ◽  
Toluene Sulfonic Acid ◽  
Optimized Conditions

The peracetalisation of a β-hydroxy hydroperoxide derived from methyl oleate was studied using benzaldehyde as a model substrate to give the corresponding fatty 1,2,4-trioxane. The desired product was obtained as a mixture of regioisomers but only one diastereoisomer of each was formed. The nature of the acid catalyst was studied and both para-toluene sulfonic acid (PTSA) and Amberlyst A35 (A35) were found to be efficient homogeneous and heterogeneous catalysts, respectively. The nature of the solvent was also investigated and ethereal solvents such as 2-methyltetrahydrofuran (2-MeTHF), methyl tert-butyl ether (MTBE) and cyclopentyl methyl ether (CPME) gave the best NMR yield (85%) for the preparation of the fatty trioxane. The optimized conditions were applied to a range of aromatic and aliphatic aldehydes and the corresponding 1,2,4-trioxanes were isolated with 30-91% yields (21 examples). The antimalarial activity of 3 trioxanes was studied against Plasmodium falciparum, however, no significant activity was detected (IC50 > 1600 nM).

Kinetics of benzene alkylation with 1-dodecene over a supported tungstophosphoric acid catalyst

2003 ◽  
Vol 249 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Jinchang Zhang ◽  
Biaohua Chen ◽  
Chengyue Li ◽  
Zuogang Zhu ◽  
Langyou Wen ◽  
...  
Keyword(s):  
Acid Catalyst ◽  
Tungstophosphoric Acid ◽  
Benzene Alkylation ◽  
Kinetics Of

A green solid acid catalyst 12-tungstophosphoric acid H3[PW12O40] supported on g-C3N4 for synthesis of quinoxalines

2020 ◽  
Vol 46 (9) ◽  
pp. 4193-4209
Author(s):  
Murugan Kumaresan ◽  
Vadivel Saravanan ◽  
Ponnusamy Sami ◽  
Meenakshisundaram Swaminathan
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Tungstophosphoric Acid
Sign in / Sign up

Export Citation Format

Share Document