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2 article(s) from Martinho, Luan A

HPW-Catalyzed environmentally benign approach to imidazo[1,2-a]pyridines

Luan A. Martinho and
Carlos Kleber Z. Andrade

Beilstein J. Org. Chem. 2024, 20, 628–637, doi:10.3762/bjoc.20.55

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Figure 1: Selected examples of commercial drugs containing the imidazo[1,2-a]pyridine core [13].

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Figure 2: Examples of application of HPW as catalyst in the synthesis of heterocyclic compounds through multi...

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Scheme 1: a) Reported phosphomolybdic acid-catalyzed synthesis of imidazo[1,2-a]pyridines via GBB-3CR. b) Att...

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Scheme 2: Substrate scope of the HPW-catalyzed GBB reactions using a range of aromatic/heteroaromatic aldehyd...

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Scheme 3: Substrate scope of the HPW-catalyzed GBB reaction using aliphatic aldehydes. Reaction conditions: 2...

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Scheme 4: Unsuccessful substrates for the HPW-catalyzed GBB-3CR for the synthesis of imidazo[1,2-a]pyridines.

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Scheme 5: 10-Fold scale-up of the HPW-catalyzed GBB reaction (5.0 mmol) between 2-aminopyridine (1a), 4-nitro...

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Scheme 6: Plausible reaction mechanism for the HPW-catalyzed GBB reaction.

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Full Research Paper

Published 19 Mar 2024

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Synthesis of novel sulfide-based cyclic peptidomimetic analogues to solonamides

José Brango-Vanegas,
Luan A. Martinho,
Lucinda J. Bessa,
Andreanne G. Vasconcelos,
Alexandra Plácido,
Alex L. Pereira,
José R. S. A. Leite and
Angelo H. L. Machado

Beilstein J. Org. Chem. 2019, 15, 2544–2551, doi:10.3762/bjoc.15.247

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Figure 1: Chemical structure of solonamides and autoinducing peptides (AIP).

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Scheme 1: Macrocyclization strategy based on S_N2’.

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Scheme 2: Chemical synthesis of the MBH adducts 2 and their carboxylic acids 3.

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Scheme 3: Chemical synthesis of the linear peptidomimetics 8.

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Scheme 4: Macrocyclization strategy based on S_N2’ reaction to affords the solonamide analogues 9 and their ov...

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Figure 2: Effect of compounds 9e and 9g at three concentrations on the hemolysis production by S. aureus ATCC...

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Figure 3: Inhibition of hemolysis (%) on human red blood cells caused by S. aureus ATCC 25923 after being in ...

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Figure 4: Cell viability of human fibroblast exposed to compounds 9e (A) and 9g (B) for 24 and 48 hours. The ...

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Published 25 Oct 2019

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