Add time:08/31/2019         Source:sciencedirect.com

We have coupled S,S′-bis-trityl N-BOC protected 1,2-ethylenedicysteamine, a bis-amino bis-thiol (BAT) tetraligand, via a propylene or ethylene spacer to several biologically active molecules including 2-nitroimidazole, desethylflumazenil, a beta-CIT analogue, glucose and 2-(2′-hydroxy-4′-aminophenyl)-1,3-benzothiazole. The conjugates were efficiently labelled with technetium-99m by consecutive heating of the S,S′-bis-trityl protected ligand in hydrochloric acid followed by neutralisation and heating in the presence of 99mTc-tartrate. The S,S′-bis-trityl BAT chelator is an interesting synthon that allows both flexible derivatisation with various biologically active molecules and facile labelling with technetium-99m.

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