G. Baziardmouysset et al., SYNTHESIS AND CALCIUM ANTAGONISTIC ACTIVITY OF A SERIES OF DIETHYL BENZOFURYL, BENZOTHIENYL AND BENZOGAMMAPYRONYL BENZYLPHOSPHONATES, European journal of medicinal chemistry, 28(7-8), 1993, pp. 539-546
In this work we present about 15 original heterocyclic diethyl benzylp
hosphonate analogues of fostedil, in which we have varied the nature o
f the heterocycle, the substituents or the phosphonic group, or even t
he position of this latter. Three diethyl 4-(2-benzofuryl) benzyl phos
phonates exhibited slightly higher calcium antagonism than the control
. Solely substitution with a fluorine atom was able to maintain activi
ty, whereas the other modifications always decreased it.