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-羟基-2-吡咯烷酮 、 1-壬醇 在
120H 作用下,
5.0~70.0 ℃
、6.67 kPa
条件下,
反应 19.0h,
以6.8 g of the expected product is obtained的产率得到5-n-nonyloxy-2-pyrrolidinone
参考文献:
名称:
Derivatives of 1-benzyl-2-oxo-5-alkoxy-pyrrolidine, and medicament
Nouveaux dérivés de 1-benzyl 2-oxo 5-alcoxy pyrrolidine, leur procédé de préparation, leur application comme médicaments et les compositions les renfermant