18F-labeling of 5-(trifluoromethyl)-dibenzothiophenium trifluoromethanesulfonate, commonly referred to as the Umemoto reagent, has been accomplished applying a halogen exchange 18F-fluorination with 18F-fluoride, followed by oxidative cyclization with Oxone and trifluoromethanesulfonic anhydride. This new 18F-reagent allows for the direct chemoselective 18F-labeling of unmodified peptides at the thiol cysteine
5-(三
氟甲基)-
二苯并噻吩三氟甲磺酸盐的 18F 标记,通常称为 Umemoto 试剂,已通过卤素交换 18F-
氟化与 18F-
氟化物,然后与 Oxone 和
三氟甲磺酸酐氧化环化来完成。这种新的 18F 试剂允许在
硫醇半胱
氨酸残基处对未修饰的肽进行直接
化学选择性 18F 标记。