[<sup>3</sup>H]Azidodantrolene: Synthesis and Use in Identification of a Putative Skeletal Muscle Dantrolene Binding Site in Sarcoplasmic Reticulum
作者:Sanjay S. Palnitkar、Bin、Leslie S. Jimenez、Hiromi Morimoto、Philip G. Williams、Kalanethee Paul-Pletzer、Jerome Parness
DOI:10.1021/jm9805079
日期:1999.6.1
skeletal muscle. Introduction of 1 mole-atom of tritium into aldehyde 5b was required during radioligand synthesis in order to ensure high enough specific activity for detection of photo-cross-linked proteins by fluorographic methods. This was accomplished by reduction of ester 3 with custom synthesized, 100% tritium-labeled lithiumtriethylborotritide, followed by oxidation to 5b by manganese(IV) oxide
丹特罗钠是医学上重要的乙内酰脲衍生物,其通过未知机制干扰钙从骨骼肌细胞内储存的释放。鉴定丹特罗的分子靶标将大大有助于理解药物的作用机理以及肌肉中细胞内Ca2 +释放的动力学。[3H]叠氮二苯并菲被设计并合成为光亲和性类似物,以鉴定骨骼肌中假定的四氢萘受体。在放射配体合成过程中需要将1摩尔原子的of引入醛5b中,以确保通过荧光照相法检测光交联蛋白具有足够高的比活。这是通过用定制的合成的100%-标记的三乙基硼三碘化锂还原酯3来完成的,然后用氧化锰(IV)氧化成5b。通过NMR光谱法证实化合物6b在亚胺位置上的/标记为> / = 95%,并且通过HPLC经验性地确定[3H]叠氮金刚烷酸钠的比放射性,并且液体闪烁计数为24.4 Ci / mmol,大约为85理论最大值的%。在骨骼肌肌质网膜的配体-受体结合研究中,发现[3H]叠氮二氢萘具有药理活性。通过SDS-PAGE和tri荧光分析法进行的光交联实验已鉴定出约160