Aryl(alkynyl)iodonium salts have been demonstrated to be valuable precursors to a diverse range of heteroaromatic ring systems including aryl[1,2-a]imidazopyridines. Successful application, using the recently described aryl(alkynyl)iodonium trifluoroacetate salts, is described, highlighting for the first time that the regioselectivity of this process is both counter-ion and concentration dependent. Studies with a carbon-13 labelled substrate established that the reactions of alkynyliodonium salts are highly complex and that multiple mechanistic processes appear to be underway simultaneously.
                                    芳基(炔基)
碘鎓盐已被证明是多种杂芳香环体系的宝贵前体,包括芳基[1,2-a]
咪唑吡啶。本文描述了成功应用最近描述的芳基(炔基)
碘鎓
三氟乙酸盐,首次强调该过程的区域选择性既依赖于对离子,也依赖于浓度。对碳-13标记底物的研究表明,炔基
碘鎓盐的反应极为复杂,并且多个反应机制似乎同时进行。