Scheme 2From: Synthesis and evaluation of fluorine-18 labelled tetrazines as pre-targeting imaging agents for PETa 6-fluoronicotinic acid was reacted with TFP and N,N-dicyclohexylcarbodiimide in acetonitrile over night at RT to form 6-fluoronicotinic acid 2,3,5,6-tetrafluorophenyl ester b The reference compounds were synthetized by direct amidationBack to article page