Mesoionic xanthine analogs: phosphodiesterase inhibitory and hypotensive activity
作者:Richard A. Glennon、Michael E. Rogers、J. Doyle Smith、M. K. El-Said、John L. Egle
DOI:10.1021/jm00138a002
日期:1981.6
Several mesoionic thiazolo[3,2-alphapyrimidines and mesoionic 1,3,4-thiadiazol[3,2-alpha-pyrimidines were evaluated as inhibitors of cyclic-AMPphosphodiesterase. While small alkyl substituents at the 6 position have no significant effect on activity, phenyl and benzyl substituents enhance activity. Mesoionic structures such as 1 (R2 = H; R8 = Et) possess 20 to 40 times the activity of theophylline