B(0)AT2, encoded by the SLC6A15 gene, is a transporter for neutral amino acids that has recently been implicated in mood and metabolic disorders. It is predominantly expressed in the brain, but little is otherwise known about its function. To identify inhibitors for this transporter, we screened a library of 3133 different bioactive compounds. Loratadine, a clinically used histamine H1 receptor antagonist, was identified as a selective inhibitor of B(0)AT2 with an IC50 of 4 μM while being less active or inactive against several other members of the SLC6 family. Reversible inhibition of B(0)AT2 was confirmed by electrophysiology. A series of loratadine analogues were synthesized to gain insight into the structure-activity relationships. Our studies provide the first chemical tool for B(0)AT2.
Palladium-Catalyzed Difluoromethylation of Aryl Chlorides and Triflates and Its Applications in the Preparation of Difluoromethylated Derivatives of Drug/Agrochemical Molecules
作者:Changhui Lu、Hao Lu、Jiang Wu、Hong C. Shen、Taishan Hu、Yucheng Gu、Qilong Shen
DOI:10.1021/acs.joc.7b02989
日期:2018.1.19
A palladium-catalyzed difluoromethylation of a series of arylchlorides and triflates under mild conditions was described. A variety of common functional groups were tolerated. In addition, by using this protocol, several drug molecules containing an arylchloride unit were successfully difluoromethylated, thus enabling medicinal chemists to rapidly access novel drug derivatives with potentially improved