Oxidative iodination of carbonyl compounds using ammonium iodide and oxone®
作者:Mahender Reddy Marri、Arun Kumar Macharla、Swamy Peraka、Narender Nama
DOI:10.1016/j.tetlet.2011.09.106
日期:2011.12
A simple, efficient, mild, and regioselective method for oxyiodination of carbonyl compounds has been reported by using NH4I as the source of iodine and Oxone® as an oxidant. Various carbonyl compounds such as aralkyl ketones, aliphatic ketones (acyclic and cyclic), and β-keto esters proceeded to the respective α-monoiodinated products in moderate to excellent yields. Unsymmetrical aliphatic ketones
A New<i>α</i>,<i>α</i>′-Diiodination of Ketones Using Iodine-Cerium(IV) Ammonium Nitrate
作者:C. Akira Horiuchi、Eiji Takahashi
DOI:10.1246/bcsj.67.271
日期:1994.1
The direct iodination of some ketones using iodine-cerium(IV) ammonium nitrate in acetic acid or acetonitrile gave the corresponding α,α′-diiodoketones in good yield. In the case of cyclododecanone (4), 3-pentanone (5), and 5-nonanone (6), cis- (meso-) compounds [2,12-diiodocyclododecanone (12), 2,4-diiodo-3-pentanone (13), and 4,6-diiodo-5-nonanone (14)] were obtained preferentially.
Irradiation of α-iodo ketone in hexane under a nitrogen atmosphere with a high-pressure mercury lamp (λ>300nm) at room temperature afforded the corresponding α,β-unsaturatedketones in good yield. This reaction affords a new, clean and convenient synthetic method for the α,β-unsaturatedketone.
Oxidation of 2-Substituted Cycloalkanones with Cerium(IV) Sulfate Tetrahydrate in Alcohols and Acetic Acid
作者:Liangyou He、C. Akira Horiuchi
DOI:10.1246/bcsj.72.2515
日期:1999.11
The reaction of 2-substituted cycloalkanones with cerium(IV) sulfate tetrahydrate (CS) in alcohols and acetic acid gave the corresponding alkyl esters of oxo acids (80—96%) and oxo acids (78—96%), respectively, by oxidative cleavage of the C(R)–C=O bond. In the case of 2-iodocycloalkanones in methanol, the dimethyl ester was obtained in good yield. A treatment of 5α-cholestan-3-one with CS in methanol
A New<b><i>α</i></b>-Iodination of Ketones Using Iodine-Ammonium Cerium(IV) Nitrate in Alcohol or Acetic Acid
作者:C. Akira Horiuchi、Shinji Kiji
DOI:10.1246/bcsj.70.421
日期:1997.2
The direct α-iodination of various ketones using iodine-ammonium cerium(IV) nitrate in acetic acid or alcohol gave the corresponding α-iodo ketones in high yields. The effect of cerium salt on the iodination of ketones, and the iodination of 5α-cholestan-3-one using several methods are also discussed. In the reaction of 3,3,5-trimethylcyclohexanone and unsymmetrical ketones, such as 2-hexanone and