<i>gem</i>-Dimethylcyclopropanation
Using Triisopropylsulfoxonium Tetrafluoroborate: Scope
and Limitations
作者:Richard Taylor、Michael Edwards、Richard Paxton、David Pugh、Adrian Whitwood
DOI:10.1055/s-0028-1083165
日期:——
A new nucleophilic isopropyl transfer reagent, triisopropylsulfoxonium tetrafluoroborate, has been prepared and evaluated. Thus, using this reagent and NaH in DMF, a range of electron deficient alkenes, including several chalcone analogues, α,β-unsaturated ketones, dienones and quinones, plus α,β-unsaturated esters, nitrile, sulfone and nitro examples, have been converted into the corresponding gem-dimethylcyclopropane compounds.
一种新的亲核异丙基转移试剂,三异丙基亚磺酸四氟硼酸盐,已被制备并评估。使用该试剂和氢化钠在二甲基形式酰胺中,一系列电子缺乏的烯烃,包括若干香豆素类似物、α,β-不饱和酮、二烯酮和醌,以及α,β-不饱和酯、腈、磺酰和硝基化合物,已被转化为相应的gem-二甲基环丙烷化合物。