Amnesia-reversal activity of a series of 5-alkoxy-1-arylcarbonyl-2-pyrrolidinones and 5-alkoxy-1-arylmethyl-2-pyrrolidinones
摘要:
A series of 5-alkoxy-1-arylcarbonyl-2-pyrrolidinones (1-27) were prepared by condensation of arylcarbonyl chlorides with 5-alkoxy-2 pyrrolidinones in the presence of butyl lithium in tetrahydrofuran. Alkylation of these intermediates with substituted benzyl bromides or chlorides, under solid/liquid phase-transfer conditions (KOH/Bu4NBr) in tetrahydrofuran, yielded 5-alkoxy-1-arylmethyl-2-pyrrolidinones (28-48). In the first series, the compounds with a 5-n-pentyloxy group had maximal ECS-induced amnesia reversing activity in mice, and in the second series, those with a 5-n-octyloxy group. In both series, substitutions on the phenyl ring had detrimental effects. The two most promising compounds 1-benzoyl-5-n-pentyloxy-2-pyrrolidinone (14) and 1-benzyl-5-n-octyloxy-2-pyrrolidinone (37) were more potent than piracetam and aniracetam and active over broader dose ranges: 50-200 and 50-400 mg/kg, po. Both compounds also reversed scopolamine-induced amnesia in mice, from 50 to 400 mg/kg, po (14) and from 100 to 400 mg/kg, po (37). Finally, 37 showed remarkable activity in protecting the mouse brain against chemically induced hypoxia, with a minimal effective dose of 50 mg/kg, ip, or 100 mg/kg, ip, in NaNO2- or KCN-induced hypoxia.
DOI:
10.1016/0223-5234(91)90102-s
作为产物:
描述:
5-乙氧基-2-吡咯烷酮 、 新戊醇 在
新戊醇 、 Hg 、 正己烷 作用下,
反应 4.25h,
以3.2 g of the expected product is obtained的产率得到5-(2,2-dimethyl)propyloxy-2-pyrrolidinone
参考文献:
名称:
Derivatives of 1-benzoyl 2-oxo 5-alkoxy pyrrolidine, their preparation,
Dérivés de la 1-benzoyl 2-oxo 5-alcoxy pyrrolidine, leur préparation, leur application comme médicament et les compositions les renfermant
申请人:ROUSSEL-UCLAF
公开号:EP0296979A2
公开(公告)日:1988-12-28
L'invention a pour objet les composés de formule (I) :
dans laquelle R′ représente un atome d'hydrogène, un radical alcoyle, linéaire, ramifié ou cyclique renfermant jusqu'à 12 atomes de carbone, un radical alcényle renfermant de 2 à 8 atomes de carbone, un radical acyle renfermant de 1 à 6 atomes de carbone ou un radical aralcoyle renfermant de 7 à 15 atomes de carbone et R représente un radical aryle renfermant jusqu'à 14 atomes de carbone éventuellement subtitué ou un radical hétérocyclique aromatique mono ou polycyclique éventuellement substitué, leur préparation, leur application comme médicaments et les compositions les renfermant.