Allyl <i>m</i>-Trifluoromethyldiazirine Mephobarbital: An Unusually Potent Enantioselective and Photoreactive Barbiturate General Anesthetic
作者:Pavel Y. Savechenkov、Xi Zhang、David C. Chiara、Deirdre S. Stewart、Rile Ge、Xiaojuan Zhou、Douglas E. Raines、Jonathan B. Cohen、Stuart A. Forman、Keith W. Miller、Karol S. Bruzik
DOI:10.1021/jm300631e
日期:2012.7.26
containing derivative of general anesthetic mephobarbital, separated the racemic mixture into enantiomers by chiral chromatography, and determined the configuration of the (+)-enantiomer as S by X-ray crystallography. Additionally, we obtained the 3H-labeled ligand with high specific radioactivity. R-(−)-14 is an order of magnitude more potent than the most potent clinically used barbiturate, thiopental
我们合成了 5-allyl-1-methyl-5-( m -trifluoromethyl-diazirynylphenyl)barbituric acid ( 14 ),一种含有三氟甲基二氮丙啶的通用麻醉剂甲氧巴比妥衍生物,通过手性色谱法将外消旋混合物分离成对映体,并确定了构型通过 X 射线晶体学将 (+)-对映异构体作为S。此外,我们还获得了具有高特异性放射性的3 H 标记配体。R -(-)- 14比临床使用的最有效的巴比妥类药物硫喷妥钠强一个数量级,其全身麻醉剂 EC 50接近丙泊酚和依托咪酯,而S -(+)- 14效力低 10 倍。此外,在接近其麻醉效力的浓度下,R -(-)- 14既能增强 GABA 诱导的电流,又能增加对人 α1β2/3γ2L GABA A受体中激动剂 muscimol的亲和力。最后,发现R -(-)- 14是一种非常有效的光标记试剂,可并入人 α1β3 GABA