Notice: Users may be experiencing issues with displaying some pages on stanfordhealthcare.org. We are working closely with our technical teams to resolve the issue as quickly as possible. Thank you for your patience.
 

Learn about the flu shot, COVID-19 vaccine, and our masking policy »

Stanford Health Care

SYNTHESIS AND ANTICHOLINERGIC PROPERTIES OF THE ENANTIOMERS OF 4-(ISOPROPYLAMINO)-2-(2-PYRIDYL)-2-PHENYLBUTYRAMIDE, THE MONO-N-DEALKYLATED METABOLITE OF DISOPYRAMIDE JOURNAL OF MEDICINAL CHEMISTRY Nelson, W. L., SNEED, C. K., Giacomini, K. M., Giacomini, J. C., Stauss, J., Blaschke, T. F., Cox, B. M. 1981; 24 (5): 614-617

Abstract

The 2R and 2S enantiomers of 4-isopropyl-2-(2-pyridyl)-2-phenylbutyramide [(2R)-2 and (2S)-2] were prepared from the respective 2R and 2S enantiomers of disopyramide [(2R)-1 and (2S)-1] by oxidation with peracid, Cope elimination, and subsequent zinc/HCl reduction of the resulting hydroxylamines (2R)-3 and (2S)-3. The enantiomers were tested as antagonists to the contraction of guinea pig ileum longitudinal muscle produced in response to electrically stimulated release of acetylcholine. The enantiomers showed IC50 values of 5.0 X 10(-6) and 14 X 10(-6) M for (2S)-2 and (2R)-2 respectively, about a 3-fold difference between enantiomers. Data are presented showing direct antagonism of acetylcholine in the guinea pig ileum assay. In a comparison of the anticholinergic effects of 2 and 1, the metabolite (2) was slightly less potent than disopyramide (1).

View details for Web of Science ID A1981LM55600024

View details for PubMedID 7241519