Potential antipsychotic agents. Part 8. Antidopaminergic properties of a potent series of 5-substituted (−)-(<i>S</i>)-<i>N</i>-[(1-ethylpyrrolidin-2-yl)methyl]-2,3-dimethoxybcnzaimides. Synthesis<i>via</i>common lithio intermediates
作者:Thomas Högberg、Peter Ström、Håkan Hall、Sven Ove Ögren
DOI:10.1002/hlca.19900730221
日期:1990.3.14
A series of 5-substituted (−)-(S)-N-[(1-ethylpyrrolidin-2-yl)methyl]-2,3-diniethoxybenzanndes were made by reaction of the corresponding benzoyl chlorides with (S)-1-ethylpyrrolidine-2-methylaruine ( 14–16, 18–21). The acids required were prepared in a regiospecific manner from 5-bromo-2,3-dimethoxybenzoic acid which was protected as dihydrooxazole ( 4–8), metalated, reacted with various electrophiles
通过使相应的苯甲酰氯与(S)-1-反应制得一系列5取代的(-)-(S)-N -[(1-乙基吡咯烷-2-基)甲基] -2,3-二乙氧基乙苯甲酸酯乙基吡咯烷-2- methylaruine(14-16,18-21)。所需的酸是以区域特异性的方式由5-溴-2,3-二甲氧基苯甲酸制备的,该酸被保护为二氢恶唑(4-8),金属化,与各种亲电试剂(MeI,EtI,BuBr,CC1 3 CCl 3或MeSSMe反应) ),然后水解(9-13)。或者,(-)-(S)-5-溴-N用KH处理-[[(1-乙基吡咯烷基-2-基)甲基] -2,3-二甲氧基苯甲酰胺,然后用BuLi和亲电试剂(I 2或Me 3 SiCl)处理,得到5-碘和5-(三甲基甲硅烷基) )分别为17和22的导数。所有的5个取代的酰胺都是大鼠纹状体膜中[ 3 H] spiperone结合的强效抑制剂,IC 50值为0.5至5 nM(表3)。因此,