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Ketalization of ketones to 1,3-dioxolanes and concurring self-aldolization catalyzed by an amorphous, hydrophilic SiO2-SO3H catalyst under microwave irradiation
(2018-08-01)
The amorphous, mesoporous SiO2-SO3H catalyst with a surface area of 115 m2 g-1 and 1.32 mmol H+ per g was very efficient for the protonation of ketones on a 10% (m/m) basis, and the catalyst-bound intermediates can be ...
Convenient synthesis of ketal derivatives from cubebin using amberlite as heterogeneous catalyst
(Springer, 2015-01-01)
Eleven ketal derivatives were prepared from the natural product cubebin using Amberlite IR-120AR as heterogeneous catalyst and ROH as the source of the alkyl group.
Ecofriendly ketalization of isatin using heteropolycompounds as catalysts
(2008)
The dioxolane ketals of isatin and 5-chloroisatin were prepared using an efficient and cleaner procedure than the usual synthetic routes. Keggin heteropolyacids, namely, heteropolyphosphotungstic acid (HPW),
HPW/SiO2 and ...
Ketalization of glycerol to solketal in supercritical acetone
(Elsevier Science, 2011-08)
In the last few years, the increasing production of biodiesel has led to an overproduction of glycerol, the main byproduct of this industry. This paper reports on the ketalization of glycerol in supercritical acetone to ...
Sunflower oil methanolisys and glycerol ketalisation: Stepwise production of biofuels and additives with 3-methylimidazolium hydrogensulphate as catalyst
(2016-01-01)
The ionic liquid 3-methylimidazolium hydrogensulfate is soluble within the glycerol phase that it creates, after catalyzing the transesterification of sunflower oil to fatty acids methyl esters with methanol. Separation ...
Ketalization of gaseous acylium ions
(Elsevier Science IncNew YorkEUA, 2001)