Abstract
N-succinimidyl-3-(tri-n-butylstannyl)benzoate ( m-BuATE), N-succinimidyl-3-(tri-methylstannyl)benzoate ( m-MeATE) and N-succinimidyl-4-(tri-n-butylstannyl)benzoate ( p-BuATE) were synthesized and radioiodinated using either N-chlorosuccinimide (NCS) or t-butylhydroperoxide (TBHP) as the oxidant. Radiohalogenation of m-MeATE proceeded more rapidly than m-BuATE. NCS was the more efficient oxidant at reaction times <15 min; use of both TBHP and NCS resulted in nearly quantitative yields after 15 min when m-MeATE was used. Using NCS, achieving optimal antibody coupling and specific binding required purification of the active ester by HPLC; in contrast, with TBHP, only Sep-Pak purification was needed.
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