Metal catalyst-free direct α-iodination of ketones with molecular iodine
摘要:
Ketones are directly converted to the corresponding alpha-iodoketones in good yields with molecular iodine under metal catalyst-free conditions. A significant difference in the reactivities was observed for aliphatic and aromatic ketones; whereas aliphatic ketones reacted smoothly at room temperature giving a mixture of 1-iodo, 3-iodo and 1,3-diiodoketones with predominant formation of the 3-iodo product, the a-iodination of aromatic ketones proceeded conveniently under heating to give good yields of alpha-iodo products. (c) 2006 Elsevier Ltd. All rights reserved.
Chemistry of α-nitroepoxides : Synthesis of useful intermediates via nucleophilic ring opening of α-nitroepoxides
作者:Yashwant D. Vankar、Kavita Shah、Anita Bawa、Surendra P. Singh
DOI:10.1016/s0040-4020(01)81002-4
日期:1991.10
Various α-nitroepoxides are converted into corresponding 1,2-diketones via two different ways of ring opening viz. with Pd(O) and with DMSO/BF3·Et2O(or ClSiMe3). In addition to this, a variety of nucleophiles are reacted with α-nitrocyclopentene oxide 6 and α-nitro-cyclohexene oxide 7 to form the corresponding α-substituted ketones which are useful intermediates in organic synthesis. Two of the products