Discovery of potent, selective sulfonylfuran urea endothelial lipase inhibitors
摘要:
Endothelial lipase (EL) activity has been implicated in HDL catabolism, vascular inflammation, and atherogenesis, and inhibitors are therefore expected to be useful for the treatment of cardiovascular disease. Sulfonylfuran urea 1 was identified in a high-throughput screening campaign as a potent and non-selective EL inhibitor. A lead optimization effort was undertaken to improve potency and selectivity, and modifications leading to improved LPL selectivity were identified. Radiolabeling studies were undertaken to establish the mechanism of action for these inhibitors, which were ultimately demonstrated to be irreversible inhibitors. (C) 2008 Elsevier Ltd. All rights reserved.
Diels–Alder reactions of five-membered heterocycles containing one heteroatom
作者:Xiaoyuan Ding、Son T. Nguyen、John D. Williams、Norton P. Peet
DOI:10.1016/j.tetlet.2014.10.114
日期:2014.12
Diels-Alder reactions of five-membered heterocycles containing one heteroatom with an N-arylmaleimide were studied. Cycloaddition of 2,5-dimethylfuran (4) with 2-(4-methylphenyl)maleimide (3) in toluene at 60 degrees C gave bicyclic adduct 5. Cycloadditions of 3 with 2,5-dimethylthiophene (11) and 1,2,5-trimethylpyrrole (14) were also studied. Interestingly, the bicyclic compound 5 cleanly rearranged
A new furan annelation by the palladium-catalyzed reaction of 2-alkynyl carbonates with β-keto esters is described. The reaction proceeds under mild neutral conditions and hence unstable 3-alkylidene-2,3-dihydrofurans can be prepared in this way. Similarly, reaction of 2-(1-alkynyl)oxiranes with β-keto esters gives alkylidene furans.
CuI-catalyzed intramolecular O-vinylation of carbonyl compounds
作者:Yewen Fang、Chaozhong Li
DOI:10.1039/b505006e
日期:——
The first copper-catalyzed intramolecular O-vinylation of carbonyl compounds with vinyl bromides was reported, among which the efficient formation of 5-, 6- and even 7-membered cyclic alkenyl ethers was achieved with β-ketoesters as nucleophiles.
La reactionde carbonates de propargyl(I) avecdes carbonucleophiles doux en presence de palladium donne des propenes disubstitues en 2,3 dans des conditions neutres. Les β-cetoesters et les β-dicetones portant deux hydrogenes actifs reagissent avec I dans le rapport 1/1. Il se produit a la fois une C- et une O-alkylation avec ces composes pour donner des methylene-4 dihydro-4,5 furannes et methyl-4
La 反应 de carbonates de propargyl(I) avec des carbonucleophiles doux en存在 de palladium donne des propenes dissubstitues en 2,3 dans des conditions neutres。Les β-cetoesters et les β-dicetones portant deux hydroes actifs reagissent avec I dans le rapport 1/1。Il se produit a la fois une C- et une O-烷基化反应组成浇注 donner des methylene-4 dihydro-4,5 furranes etmethyl-4 furanes
Verhe, R.; De Kimpe, N.; De Buyck, L., Bulletin des Societes Chimiques Belges, 1983, vol. 92, # 4, p. 371 - 396
作者:Verhe, R.、De Kimpe, N.、De Buyck, L.、Courtheyn, D.、Caenegem, L. Van、Schamp, N.