Lithio iodomethyl phenylsulfoxides reacted with alkyl halides and carbonyl compounds to give adducts in good to moderate yields. Solvolysis of the carbonyl adducts led to sulfones or the ring expanded product.
Copper-Mediated Vicarious Substitution of 1,3-Dinitrobenzene with lodophenols or lodomethyl Phenyl Sulfoxide/Sulfone
作者:Olof Haglund、Abdul A. K. M. Hai、Martin Nilsson
DOI:10.1055/s-1990-27061
日期:——
1,3-Dinitrobenzene reacts with 4-iodophenol or 2-iodophenol in the presence of copper(I) tert-butoxide and pyridine to give 2′,6′- dinitrobiphenyl-4-ol and 1-nitrodibenzofuran, respectively, in good yield. Similarly, iodomethyl phenyl sulfone or sulfoxide and 1,3-dinitrobenzene are selectively converted into 2,6-dinitrobenzyl phenyl sulfone and sulfoxide, respectively. We believe that the reactions proceed via Meisenheimer intermediates formed from 1,3-dinitrobenzene and the iodophenol, from which a proton and copper(I) iodide are eliminated. The result is a copper-mediated, selective vicarious nucleophilic substitution of hydrogen at C-2 of 1,3-dinitrobenzene.
Iodomethylsulphoxides may be synthesized in good yields by the reaction of diazomethane with sulphinyl chlorides in the presence of alkali metal iodides.
[EN] CHIRAL SULFUR OXIDE-CONTAINING ARYL FORMAMIDE COMPOUND AND SALT THEREOF, PREPARATION METHOD THEREFOR, HERBICIDAL COMPOSITION, AND APPLICATION<br/>[FR] COMPOSÉ DE FORMAMIDE ARYL CONTENANT DE L'OXYDE DE SOUFRE CHIRAL ET SEL DE CELUI-CI, SON PROCÉDÉ DE PRÉPARATION, COMPOSITION HERBICIDE ET UTILISATION<br/>[ZH] 一种含手性硫氧化物的芳基甲酰胺类化合物或其盐、制备方法、除草组合物和应用