[Diethyl benzylpiperazinomethyl and benzylpiperazinomethylbenzyl phosphonates as calcium inhibitors].

Two sets of phosphonic diethylester including a substituted benzylpiperazine moiety are synthesized. In spite of the spasmolytic or the calcium antagonistic potentialities of benzylpiperazine and phosphonic moieties, none of the six compounds, tested in vitro, exhibit any calcium antagonistic profile.