A simple and efficient palladium-catalyzed intramolecular carbonylativesynthesis of isocoumarins and phthalides from the easily available starting materials by employing phenylformate as a CO surrogate has been achieved. The approach affords target compounds in good to excellent yields with the advantages of lower toxicity, milder conditions, easy operation and wide functional group tolerance.
Ag<sub>2</sub>O nanoparticle-catalyzed substrate-controlled regioselectivities: direct access to 3-ylidenephthalides and isocoumarins
作者:Sandeep Chaudhary、Bharti Rajesh K. Shyamlal、Lalit Yadav、Mohit K. Tiwari、Krishan Kumar
DOI:10.1039/c8ra03926g
日期:——
nanoparticle-catalyzed, direct regioselective synthesis of 3-ylidenephthalides 11–16 and isocoumarins 17–20 via sonogashira type coupling followed by substrate-controlled 5-exo-dig or 6-endo-dig cyclization reaction, respectively. This one pot coupling involves reaction of substituted 2-halobenzoic acid with meta/para-substituted and ortho-substituted terminal alkynes, which proceeded in a regioselective manner resulting
Verwendung von 3-Benzalphthaliden als UV -Stabilisatoren für thermoplastische, aromatische Polyester, Polycarbonate und Polyestercarbonate
申请人:BAYER AG
公开号:EP0232734A1
公开(公告)日:1987-08-19
Gegebenenfalls substituierte 3-Benzalphthalide sind wirksame UV-Stabilisatoren für thermoplastische aromatische Polyester, Polycarbonate und Polyestercarbonate.
可能取代的 3-苯并邻苯二甲酸盐是热塑性芳香族聚酯、聚碳酸酯和聚酯碳酸盐的有效紫外线稳定剂。
Anti-HIV activity of stilbene-related heterocyclic compounds
作者:Luis M. Bedoya、Esther del Olmo、Rocío Sancho、Bianca Barboza、Manuela Beltrán、Ana E. García-Cadenas、Sonsoles Sánchez-Palomino、José L. López-Pérez、Eduardo Muñoz、Arturo San Feliciano、José Alcamí
DOI:10.1016/j.bmcl.2006.04.087
日期:2006.8
Viral transcription has not been routinely targeted in the development of new antiviral drugs. This crucial step of the viral cycle depends on the concerted action of cellular and viral proteins such as NF-kappa B and Tat. In the present study, stilbene-related heterocyclic compounds including benzalphthalide, phthalazinone, imidazoindole and pyrimidoisoindole derivatives are tested for their anti-HIV activity. Original assays based on recombinant viruses were used to evaluate HIV replication inhibition and stably transfected cell lines were used to evaluate inhibition of Tat and NF-kappa B proteins. Some of the stilbene-related heterocyclic compounds analysed displayed anti-HIV activity through interference with NF-kappa B and Tat function. Moreover, compounds inhibiting both targets displayed a stronger activity on viral replication. (c) 2006 Elsevier Ltd. All rights reserved.