HCV NS5A replication complex inhibitors. Part 3: discovery of potent analogs with distinct core topologies
摘要:
In a recent disclosure,(1) we described the discovery of dimeric, prolinamide-based NS5A replication complex inhibitors exhibiting excellent potency towards an HCV genotype 1b replicon. That disclosure dealt with the SAR exploration of the peripheral region of our lead chemotype, and herein is described the SAR uncovered from a complementary effort that focused on the central core region. From this effort, the contribution of the core region to the overall topology of the pharmacophore, primarily vector orientation and planarity, was determined, with a set of analogs exhibiting < 10 nM EC50 in a genotype 1b replicon assay. (c) 2012 Elsevier Ltd. All rights reserved.
The use of enaminones and enamines as effective synthons for MSA-catalyzed regioselective synthesis of 1,3,4-tri- and 1,3,4,5-tetrasubstituted pyrazoles
In the present work, an efficient regioselectivesynthesis of 1,3,4-tri- and 1,3,4,5-tetrasubstituted pyrazoles via a methanesulfonic acid (MSA)-catalyzed reaction of hydrazones with enaminones or enamines is reported. Mechanistically, the formation of the title compounds involves the [2+3] cycloaddition of hydrazones with enaminones or enamines followed by aromatization with acid and oxygen. This
Synthesis of 4-Hetarylisoxazoles from Amino Acid-Derived Halogenoximes and Push-Pull Enamines
作者:Bohdan A. Chalyk、Kateryna V. Hrebeniuk、Konstantin S. Gavrilenko、Irene B. Kulik、Alexander B. Rozhenko、Dmitriy M. Volochnyuk、Oleksandr S. Liashuk、Oleksandr O. Grygorenko
DOI:10.1002/ejoc.201800753
日期:2018.11.1
Reaction of chloroximes with protected amino group and enamines bearing electron‐withdrawing groups at the β position (i.e. push‐pull enamines) under basic conditions led to 3,4‐disubstituted isoxazole derivatives bearing hetaryl, nitro, or difluoroacetyl group at the 4th position.
Facile, Environmentally Friendly Synthesis of Benzaldehyde and Phenylacetaldehyde Analogs from Readily Available Toluene Derivatives
作者:Liyan Dai、Jie Yu、Yingqi Chen、Shichao Yu
DOI:10.1080/00397911.2010.517366
日期:2011.10.15
A facile environmentally friendly synthesis of bezaldehyde and phenylacetaldehyde analogs from readily available toluene derivatives is described. Oxidation of the styrylamines by H(2)O(2) affords benzaldehydes in moderate yields, while the hydrolysis of styrylamines afforded phenylacetaldehyde analogs in good yields.
Bredereck,H. et al., Chemische Berichte, 1968, vol. 101, # 12, p. 4048 - 4056