A process for preparing chelating agents (ligands) type poliaminoditioles (as divisional of patent application for invention no. 542,678, filed 29 April 1985)

摘要

A compound of the structure: …CHEM… wherein each R min is independently a hydrogen atom, an alkyl group or X, and at least one of the groups R min is X, m is 0 or 1, Z is the anion of a strong mineral acid, b is an integer of 2 or greater and X has the formula: …CHEM… where R sec and R''' are independently hydrogen atoms or alkyl groups, Ar is an aromatic group, and a, d and n are integers. The compounds are usefully converted to technetium-99m complexes. The technetium-99m complexes are useful in brain perfusion imaging.