Synthfsis of bis(aziridinyl)phosphinyl-N-hydroxyurethane derivatives as antineoplastic agents.

Several new "dual antagonists" were synthesized in which the 2,2-dimethyl (or ring C unsubstituted) aziridine phosphinyl function is linked to N-hydroxyurethane rather than the urethane moiety. Three of the new compounds showed very high activities against leukemia L1210 in mice.