Nucleophilic Desulfinylation of α-Fluoro-β-(alkoxy and silyloxy) Sulfoxides.Effects of the β-Oxy Substituents on Protonation, 1,2-Hydrogen Migration, and Nucleophile Addition to the Fluorocarbenoid Centers
作者:Hidemitsu Uno、Katsuji Sakamoto、Hitomi Suzuki
DOI:10.1246/bcsj.65.218
日期:1992.1
resulted in the formation of a fluorostilbene derivative, a fluoro enol silyl ether and small amounts of 4-(fluoroacetyl)biphenyl, while a similar reaction of 2-methoxymethoxy analog mainly led to the fluorostilbene derivatives and a simple desulfinylation product. In contrast, both sulfoxides reacted with PhLi to give chlorofluoro compounds and fluoro enol ethers. In these reactions, the stability
用 PhMgBr 处理 2-(4-联苯基)-2-叔丁基二甲基甲硅烷氧基-1-氯-1-氟乙基苯基亚砜导致形成氟二苯乙烯衍生物、氟烯醇甲硅烷基醚和少量 4-(氟乙酰基)联苯,而 2-甲氧基甲氧基类似物的类似反应主要导致氟二苯乙烯衍生物和简单的脱亚磺酰化产物。相比之下,两种亚砜都与 PhLi 反应生成氯氟化合物和氟烯醇醚。在这些反应中,亚砜部分的亲核去除衍生的类卡宾的稳定性受β-取代基的影响很大,从而控制了产物分布。