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.
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
N-heterocyclic carbenes (NHCs) are well-known as ligands and organocatalysts, but there is no recognition for their catalytic role as a stabilizer through electrostatic interaction rather than electron donation. By utilizing the electrostatic interaction, we herein describe the success of a visible-light-triggered radical–radical cross-coupling of N-alkenoxypyridinium salts and NaI, giving a variety
Method of treating hyperlipidemia and inflammation with sulfonate
申请人:Taiho Pharmaceutical Company, Limited
公开号:US04411911A1
公开(公告)日:1983-10-25
Novel sulfonate derivatives represented by the formula R.sub.1 SO.sub.3 CH.sub.2 CO(CH.sub.2).sub.n R.sub.2 act to inhibit esterases and chymotripsin and are useful as antilipemic agents, anti-inflammatory agents, immunity controlling agents, etc.
A general, rapid, and scalable method for the preparation of α-halogenatedketones using N-alkenoxypyridinium salts as substrates and quaternary ammonium salts as halogen sources was developed, featuring mild reaction conditions, excellent functional group tolerance, short reaction times, and a wide substrate scope.