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Mostrando ítems 331-340 de 466
Artículo
1,4-Dideoxy-1,4-imino-d-arabinitol (DAB) Analogues Possessing a Hydrazide Imide Moiety as Potent and Selective α-Mannosidase Inhibitors
(American Chemical Society, 2020)
The synthesis of two polyhydroxylated pyrrolidines as 1,4-dideoxy-1,4-imino-d-arabinitol (DAB) analogues bearing a hydrazide moiety is described. The DAB analogues act as selective and potent inhibitors of α-mannosidase ...
Artículo
Solvent-free synthesis of quaternary alpha-hydroxy alpha-trifluoromethyl diazenes: the key step of a nucleophilic formylation strategy
(Royal Society of Chemistry, 2016)
An efficient, scalable and operationally simple one-pot, 2-step strategy for the nucleophilic formylation of trifluoromethyl ketones is presented. The key step is an unprecedented diaza-carbonyl-ene reaction of formaldehyde ...
Artículo
Stereoselective synthesis of chiral furan amino acid analogues of D- and L-serine from D-sugars
(Georg Thieme Verlag, 2006)
The synthesis of chiral furan amino acid analogues of D - and L -serine is reported. The developed methodology starting from D -xylose affords the corresponding amino acid derivative analogue of D -serine ...
Artículo
NleB/SseK-catalyzed arginine-glycosylation and enteropathogen virulence are finely tuned by a single variable position contiguous to the catalytic machinery
(Royal Society of Chemistry, 2021)
NleB/SseK effectors are arginine-GlcNAc-transferases expressed by enteric bacterial pathogens that modify host cell proteins to disrupt signaling pathways. While the conserved Citrobacter rodentium NleB and E. coli NleB1 ...
Tesis Doctoral
Reacción de 1-Alquilamino-1-Desoxi-2-Cetosas con isotiocianatos de metilo y fenilo
(1983-05-01)
Se ha estudiado la reaccion de 1-alquilamino-1-desoxi-2-cetosas con isotiocianatos de metilo y fenilo en la que se obtienen polihidroxialquil-imidazol-2-tionas c-nucleosidos y espironucleosidos. Las estructuras de estos ...
Tesis Doctoral
Hydrazones as C-Nucleophiles in Asymmetric Organocatalysis
(2021-06-25)
In this PhD Thesis, novel catalytic processes and methodologies for the asymmetric functionalization of prochiral substrates (neutral or ionic) employing hydrazones as versatile umpolung reagents have been developed. In ...
Tesis Doctoral
Artículo
A broadened scope for the use of hydrazones as neutral nucleophiles in the presence of H-bonding organocatalysts
(2006)
Using thioureas as H-bonding organocatalysts, nitroalkenes can be activated for the conjugate addition of hydrazones as neutral nucleophiles. Formaldehyde derivatives react at the azomethine carbon as expected, whereas ...
Tesis Doctoral
Inositolfosfoglicanos síntesis, estructura y actividad biológica
(2004)
Aunque la hipótesis del segundo mensajero está basada en sólidas evidencias experimentales, la complejidad del mecanismo de señalización de la insulina y lo fragmentario y, en muchos aspectos controvertido, de estas ...