Site-Selective C–H Functionalization of (Hetero)Arenes via Transient, Non-symmetric Iodanes
作者:Stacy C. Fosu、Chido M. Hambira、Andrew D. Chen、James R. Fuchs、David A. Nagib
DOI:10.1016/j.chempr.2018.11.007
日期:2019.2
A strategy for C–H functionalization of arenes and heteroarenes has been developed to allow site-selective incorporation of various anions, including Cl, Br, OMs, OTs, and OTf. This approach is enabled by in situ generation of reactive, non-symmetric iodanes by combining anions and bench-stable PhI(OAc)2. The utility of this mechanism is demonstrated via para-selective chlorination of medicinally relevant
已经开发了一种将芳烃和杂芳烃进行C-H官能化的策略,以允许位点选择性结合各种阴离子,包括Cl,Br,OMs,OTs和OTf。通过结合阴离子和稳定的PhI(OAc)2原位生成反应性,不对称碘化物,可以实现此方法。该机制的实用性通过与药用相关的芳烃的对位选择性氯化以及杂芳烃的位点选择性C–H氯化反应得以证明。光谱,计算和竞争实验描述了这些瞬态,不对称碘的独特性质,反应性和选择性。