title: Novel 3,7-diheterabicyclo[3.3.1]nonanes that possess predominant class III antiarrhythmic activity in 1-4 day post infarction dog models: X-ray diffraction analysis of 3-[4-(1H-imidazol-1-yl)benzoyl]-7-isopropyl-3,7-diazabicyclo[3.3.1]nona ne dihydroperchlorate.
abstract: Several 3,7-diheterabicyclo[3.3.1]nonanes (DHBCNs) were prepared and screened in the Harris dog model for their ability to abolish pace-induced and sustained ventricular tachycardia (SVT) or prevent induction of ventricular tachycardia. In addition, an electrophysiological examination was made in the infarcted hearts of each animal to determine if more than one class activity was present. The examples exhibited predominately class III antiarrhythmic activity via a prolongation of the ventricular effective refractory period (VERP) in the models, although there may well be an underlying class Ib action present as exemplified by the ability of several of the agents to slow conduction in the myocardial infarcted dog hearts. 3-[4-(1H-Imidazol-1-yl)benzoyl]-7-isopropyl-3,7-diazabicyclo[3.3.1]nonan e dihydroperchlorate displayed powerful class III activity in the model systems while several other DHBCNs exhibited various degrees of class III action. An X-ray diffraction analysis revealed that this compound has a 3,7-diazabicyclo[3.3.1]nonane bicyclic unit in a chair-chair conformation.
authors.affiliation: Department of Chemistry, Oklahoma State University, Stillwater 74078, USA.
authors.forename: G L
authors.initials: GL
authors.lastname: Garrison
authors.forename: K D
authors.initials: KD
authors.lastname: Berlin
authors.forename: B J
authors.initials: BJ
authors.lastname: Scherlag
authors.forename: R
authors.initials: R
authors.lastname: Lazzara
authors.forename: E
authors.initials: E
authors.lastname: Patterson
authors.forename: T
authors.initials: T
authors.lastname: Fazekas
authors.forename: S
authors.initials: S
authors.lastname: Sangiah
authors.forename: C L
authors.initials: CL
authors.lastname: Chen
authors.forename: F D
authors.initials: FD
authors.lastname: Schubot
authors.forename: D
authors.initials: D
authors.lastname: van der Helm
mesh_terms: D000818:Animals; D000889:Anti-Arrhythmia Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D001794:Blood Pressure / Q000187:drug effects; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D018360:Crystallography, X-Ray; D004285:Dogs; D004594:Electrophysiology; D006339:Heart Rate / Q000187:drug effects; D007093:Imidazoles / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D008012:Lidocaine / Q000494:pharmacology; D008958:Models, Molecular; D008968:Molecular Conformation; D015394:Molecular Structure; D009203:Myocardial Infarction / Q000150:complications; D017180:Tachycardia, Ventricular / Q000188:drug therapy* / Q000517:prevention & control
chemical_list: D000889:Anti-Arrhythmia Agents; D019086:Bridged Bicyclo Compounds, Heterocyclic; D007093:Imidazoles; C095121:GLG-V 13; D008012:Lidocaine