Synthesis and preliminary affinity testing of 123I/125I-N-(3-iodophenyl)-2-methylpyrimidine-4,6-diamine as a novel potential lung scintigraphic agen

Abstract

Radioiodinated N-(3-iodophenyl)-2-methylpyrimidine-4,6-diamine (radioiodinated IPMPD), a potential lung scintigraphic agent, was synthesized via direct electrophilic substitution. Factors affecting the radiochemical yield were studied in detail. High radiochemical yield (92.3 ± 2.3%) was reached. The compound is stable in vitro for 24 h. Radioiodinated IPMPD was biologically evaluated in normal Albino mice. The compound demonstrated high lung uptake (21.4 ± 1.7% of injected dose per gram organ at 15 min) and thus shows promise for lung perfusion scintigraphy