Oxidative Homologation of Aldehydes to α-Ketoaldehydes by using Iodoform, o-Iodoxybenzoic Acid, and Dimethyl Sulfoxide
作者:Andrea Zall、Dennis Bensinger、Boris Schmidt
DOI:10.1002/ejoc.201101835
日期:2012.3
three-step synthetic route to α-ketoaldehydes starting from aryl aldehydes is reported. The aldehydes were treated with iPrMgCl and iodoform to obtain β-diiodoalcohols, which were then oxidized with o-iodoxybenzoic acid at room temperature to the corresponding β-diiodoketones. Subsequent reaction of the β-diiodoketone to the α-ketoaldehyde occurred under oxygen transfer from dimethyl sulfoxide. These sensitive
报道了一种以芳基醛为原料制备 α-酮醛的有效三步合成路线。醛用 iPrMgCl 和碘仿处理得到 β-二碘醇,然后在室温下用邻碘苯甲酸氧化成相应的 β-二碘酮。β-二碘酮与 α-酮醛的后续反应发生在二甲亚砜的氧转移下。这些敏感产物与邻苯二胺原位环化形成稳定的单取代喹喔啉,可轻松表征和分离。