作者:John W. Ellingboe、Madelene Antane、Thomas T. Nguyen、Michael D. Collini、Schuyler Antane、Reinhold Bender、Dale Hartupee、Valerie White、John McCallum
DOI:10.1021/jm00030a013
日期:1994.2
A series of pyrido[2,3-d]pyrimidine angiotensin II (A II) antagonists was synthesized and tested for antagonism of A II. Compounds with a biphenylyltetrazole pharmacophore and small alkyl groups at the 2- and ii-positions Of the pyridopyrimidine ring were found to be the most potent in an AT(1) receptor binding assay and in blocking the A II presser response in anesthetized, ganglion-blocked A II-infused rats. 5,8-Dihydro-2,4-dimethyl-8-[(2'-(1H-tetrazol-5-yl)[1,1'-biphenyl]-4-yl)methyl] pyrido[2,3-d]pyrimidin-7(6H)-one (4a) was one of the more potent compounds in the binding assay and was the most efficacious compound in the A II-infused rat model. Further study of 4a;in Goldblatt (2K-1C) rats showed the compound to have oral bioavailability and to be an efficacious and potent compound in a high renin form of hypertension.