Now showing items 1-10 of 56
Ketalization of ketones to 1,3-dioxolanes and concurring self-aldolization catalyzed by an amorphous, hydrophilic SiO2-SO3H catalyst under microwave irradiation
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
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.
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
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)
Transacetalization with acylium ions. A structurally diagnostic ion/molecule reaction for cyclic acetals and ketals in the gas phase
(Amer Chemical SocWashington, 1997)
Estudo de formação de tris-acetal internoe espiro-carbocíclicos a partir de (R)-(–)-e espiro-carbocíclicos a partir de (R)-(–)
(Universidade Federal de São CarlosUFSCarPrograma de Pós-graduação em QuímicaCâmpus São Carlos, 2016-11-07)
In this work we studied, initially, the formation of the internal tris-ketals derivatives from their respective 2,2-bis-propargyl cyclic ketones from catalysis by gold complexes. The reaction conditions were studied for ...