Search results for: Valquiria Aragão-Leoneti

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CuAAC click chemistry with N-propargyl 1,5-dideoxy-1,5-imino-D-gulitol and N-propargyl 1,6-dideoxy-1,6-imino-D-mannitol provides access to triazole-linked piperidine and azepane pseudo-disaccharide iminosugars displaying glycosidase inhibitory properties

Luís Otávio B. Zamoner, Valquíria Aragão-Leoneti, Susimaire P. Mantoani, Michael D. Rugen, more

Carbohydrate Research > 2016 > 429 > C > 29-37

Protecting group-free synthesis of 1,2:5,6-di-anhydro-D-mannitol, followed by ring opening with propargylamine and subsequent ring closure produced a separable mix of piperidine N-propargyl 1,5-dideoxy-1,5-imino-D-gulitol and azepane N-propargyl 1,6-dideoxy-1,6-imino-D-mannitol. In O-acetylated form, these two building blocks were subjected to CuAAC click chemistry with a panel of three differently...

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The methylic versus the ethylic route: considerations about the sustainability of Brazilian biodiesel production

Alexandre Bevilacqua Leoneti, Valquiria Aragão-Leoneti, Simone Vasconcelos Ribeiro Galina, Geciane Silveira Porto

Environment, Development and Sustainability > 2017 > 19 > 2 > 637-651

Brazil is considered one of the world’s leading producers of biofuels given the predominance of ethanol fuel in its energy matrix. However, despite the prominence of Brazil in ethanol production, the vast majority of biodiesel production plants in Brazil use methanol instead of ethanol as the alcohol for transesterification reaction, as is generally the case in the rest of the world. The aim of this...

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Simple and efficient synthesis of 2,5-anhydro-d-glucitol

Valquiria Aragão-Leoneti, Ivone Carvalho

Tetrahedron Letters > 2013 > 54 > 9 > 1087-1089

The synthesis of 2,5-anhydro-d-glucitol is described via intramolecular cyclization of diepoxide using ammonium formate in MeOH by a microwave-assisted reaction. The overall yield was 32% from d-mannitol derivative involving seven steps.

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Glycerol as a by-product of biodiesel production in Brazil: Alternatives for the use of unrefined glycerol

Alexandre Bevilacqua Leoneti, Valquiria Aragão-Leoneti, Sonia Valle Walter Borges de Oliveira

Renewable Energy > 2012 > 45 > Complete > 138-145

On January 1 2008, Brazil included yet another element into its energy matrix: biodiesel. The predominant biodiesel production process involves a phase of transesterification that yields glycerol as a by-product. The use of this glycerol is limited since it is considered an unrefined raw material that must be refined for its various types of use. Several studies have addressed identification of possible...

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Application of copper(I)-catalysed azide/alkyne cycloaddition (CuAAC) ‘click chemistry’ in carbohydrate drug and neoglycopolymer synthesis

Valquiria Aragão-Leoneti, Vanessa L. Campo, Adriane S. Gomes, Robert A. Field, more

Tetrahedron > 2010 > 66 > 49 > 9475-9492

An overview of the potential application of copper(I)-catalysed azide/alkyne cycloaddition (CuAAC) ‘click chemistry’ in the synthesis of bioactive carbohydrates and neoglycopolymers is described.

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Search results for: Valquiria Aragão-Leoneti

CuAAC click chemistry with N-propargyl 1,5-dideoxy-1,5-imino-D-gulitol and N-propargyl 1,6-dideoxy-1,6-imino-D-mannitol provides access to triazole-linked piperidine and azepane pseudo-disaccharide iminosugars displaying glycosidase inhibitory properties

The methylic versus the ethylic route: considerations about the sustainability of Brazilian biodiesel production

Simple and efficient synthesis of 2,5-anhydro-d-glucitol

Glycerol as a by-product of biodiesel production in Brazil: Alternatives for the use of unrefined glycerol

Application of copper(I)-catalysed azide/alkyne cycloaddition (CuAAC) ‘click chemistry’ in carbohydrate drug and neoglycopolymer synthesis

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