A journey from benzanilides to dithiobenzanilides: Synthesis of selective spasmolytic compounds
作者:Gerda Brunhofer、Walter H. Granig、Christian R. Studenik、Thomas Erker
DOI:10.1016/j.bmc.2010.11.043
日期:2011.1
A series of dithiobenzanilide derivatives was synthesized and each compound was evaluated for its ability to reduce KCl-induced contractions of smooth muscle preparations of the guinea pig. Starting from a recent publication describing benzanilide derivatives as antispasmodic agents, structure-activity guided synthesis was performed to obtain compounds with improved spasmolytic activity. First, compounds with two amide bonds were designed and second, both amide oxygens were replaced by two sp(2) sulfur atoms resulting in dithiobenzanilide derivatives. The most potent antispasmodic dithiobenzanilide 19 showed improved activity with an IC50 value of 0.4 mu M. Moreover, the study also demonstrated that these active compounds were able to antagonize the effect of spasmogens like acetylcholine and phenylephrine and that the activity is not mediated by activation of ATP-dependent potassium channels (K-ATP-channels) or inhibition of endothelial nitric oxide synthase (eNOS). (C) 2010 Elsevier Ltd. All rights reserved.
KAR, A., PHARMAZIE, 1983, 38, N 5, 313-315
作者:KAR, A.
DOI:——
日期:——
Synthesis of Structurally Diverse Benzotriazoles via Rapid Diazotization and Intramolecular Cyclization of 1,2‐Aryldiamines
作者:Réka J. Faggyas、Nikki L. Sloan、Ned Buijs、Andrew Sutherland
DOI:10.1002/ejoc.201900463
日期:2019.9
mild conditions, using a polymer‐supported nitrite reagent and p‐tosic acid. The functional group tolerance of this approach was further demonstrated with effective activation and cyclization of N‐alkyl, ‐aryl, and ‐acyl ortho‐aminoanilines leading to the synthesis of N1‐substituted benzotriazoles. The synthetic utility of this one‐pot heterocyclization process was exemplified with the preparation of a