翻訳と辞書 Words near each other ・ Desulfobulbus propionicus ・ Desulfocapsa sulfexigens ・ Desulfocapsa thiozymogenes ・ Desulfococcus oleovorans Strain Hxd3 ・ Desulfofrigus fragile ・ Desulfofrigus oceanense ・ Desulfoglucosinolate sulfotransferase ・ Desulfohalobium retbaense ・ Desulfomonile limimaris ・ Desulfomonile tiedjei ・ Desulfonatronovibrio hydrogenovorans ・ Desulfonatronovibrio thiodismutans ・ Desulfonatronum thioautotrophicum ・ Desulfonatronum thiodismutans ・ Desulfonatronum thiosulfatophilum ・ Desulfonylation reactions ・ Desulforudis ・ Desulfosporomusa ・ Desulfosporosinus ・ Desulfotomaculum ・ Desulfotomaculum arcticum ・ Desulfotomaculum geothermicum ・ Desulfotomaculum halophilum ・ Desulfotomaculum thermoacetoxidans ・ Desulfovibrio ・ Desulfovibrio alaskensis ・ Desulfovibrio bastinii ・ Desulfovibrio brasiliensis ・ Desulfovibrio butyratiphilus ・ Desulfovibrio carbinolicus Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Desulfonylation reactions ： ウィキペディア英語版 Desulfonylation reactions Desulfonylation reactions are chemical reactions leading to the removal of a sulfonyl group from organic compounds. As the sulfonyl functional group is electron-withdrawing, methods for cleaving the sulfur-carbon bonds of sulfones are typically reductive in nature. Olefination or replacement with hydrogen may be accomplished using reductive desulfonylation methods. ==Introduction== The sulfonyl functional group (RS(O)2R') has become an important electron-withdrawing group for modern organic chemistry. α-Sulfonyl carbanions may be used as nucleophiles in alkylation reactions, Michael-type additions, and other processes. After having served their synthetic purpose, sulfonyl groups are often removed. In the presence of certain reducing agents, one of the sulfur-carbon bonds of the sulfonyl group is cleaved, leading to sulfur-free organic products. Depending on the nature of the substrate and reaction conditions, alkyl sulfones afford either the corresponding alkanes or olefins (the Julia olefination). Reductive desulfonylation is typically accomplished with active metals or salts (sodium amalgam, aluminium amalgam, magnesium, samarium(II) iodide), tin hydrides (tributyltin hydride), or transition metal complexes with reducing agents or nucleophiles (PdCl2(dppp)/LiHBEt3, Pd(PPh3)4/LiHBEt3, Pd(PPh3)4/NaHC(CO2Et)2). Alkyl, alkenyl, and allylic sulfones may be reduced using one or more of these methods. (1)File:DesulfGen.png 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Desulfonylation reactions」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.