Tiacumicin B(也称为 fidaxomicin 或 difimicin)是一种市售的 18 元大环内酯抗生素,用于治疗艰难梭菌感染。Tiacumicin B 的结构特征是芳环上被两个氯原子取代,由卤化酶 TiaM 安装。在研究 TiaM 的卤化物相容性期间,发现了一种简便、非酶促的双氯硫霉素 B 碘化方法,需要 NaI、酸和空气在室温下进行碘化。该方法也适用于其他 9 种具有富电子位点的芳香族底物用于碘化。
Iodination of arene-containing natural products employing N-iodosuccinimide catalyzed by In(OTf)(3) at ambient temperature is reported as a versatile and mild method for natural product derivatization amenable to small scale. This process facilitates natural product derivatization of arene moieties for SAR studies, homo- and heterodimerization of natural products, and also conjugation with reporters such as biotin via subsequent metal-mediated coupling reactions.