A New α-Iodination of Ketones Using Iodine–Cerium(IV) Ammonium Nitrate
作者:C. Akira Horiuchi、Shinji Kiji
DOI:10.1246/cl.1988.31
日期:1988.1.5
Direct α-iodination of some ketones using iodine–cerium(IV) ammonium nitrate in acetic acid or methanol, gave the corresponding α-iodoketone in high yield. In the case of 2-pentanone, 4-methyl-2-pentanone, 2-hexanone, and 2-heptanone in methanol, the regioselective products were obtained.
Room temperature ionic liquids (ILs) are used as a green recyclable reaction media for the α-monohalogenation of 1,3-diketones, β-keto-esters and cyclic ketones with N-halosuccinimides in excellent yields in the absence of a catalyst. The recovered ionic liquid was reused five to six times with consistent activity.