One-Pot Synthesis of Highly Functionalized Pyridines via a Rhodium Carbenoid Induced Ring Expansion of Isoxazoles
作者:James R. Manning、Huw M. L. Davies
DOI:10.1021/ja803139k
日期:2008.7.1
A concise one-pot synthesis of highlyfunctionalized pyridines has been developed. The first step in the reaction sequence is the formal insertion of rhodium vinylcarbenoids across the N-O bond of isoxazoles. Upon heating, the insertion products undergo a rearrangement to give 1,4-dihydropyridines. DDQ oxidation then affords the corresponding pyridines in 31-84% yield. The process has proven general
已开发出高度官能化吡啶的简洁一锅法合成。反应序列中的第一步是将乙烯基卡宾铑正式插入到异恶唑的 NO 键上。加热后,插入产物发生重排,得到 1,4-二氢吡啶。然后DDQ氧化以31-84%的产率提供相应的吡啶。该过程已被证明适用于一系列类卡宾和异恶唑组分,并代表了合成功能化吡啶的独特断开策略。
Design, Synthesis and Protection Against Pentylenetetrazole-induced Seizure of N-aryl Derivatives of the Phthalimide Pharmacophore
作者:Asghar Davood、Hamed Shafaroodi、Mohsen Amini、Alireza Nematollahi、Mehrshad Shirazi、Maryam Iman
DOI:10.2174/157340612802084289
日期:2012.9.1
A series of compounds including N-aryl substituents of phthalimide and 4-nitrophthalimide were synthesized and evaluated for their anticonvulsant properties. The in vivo screening data suggest that all the analogs have the ability to protect against pentylenetetrazole-induced seizures. These compounds exerted their maximal effects 30 min after administration. The most potent compound in both, tonic and clonic seizure was 1-naphthyl derivative (comp. 6), which was more active than the reference drug known as Phenytoin. Using an open pore model of the Na channel, these anticonvulsants were docked in the active site and examined in relation to the residues identified by mutagenesis as important for their binding energies. Docking studies revealed that all compounds (1-13) interacted mainly with residues II-S6 of NaV1.2 by making hydrogen bonds and additional hydrophobic interactions with domain I and II in the channel's inner pore.