Inherent Oxygen Preference in Enolate Monofluoromethylation and a Synthetic Entry to Monofluoromethyl Ethers
作者:Yoshinori Nomura、Etsuko Tokunaga、Norio Shibata
DOI:10.1002/anie.201006218
日期:2011.2.18
Expect the unexpected: The self‐stable salts 1, X=OTf, PF6, x=2, y=1, developed for electrophilic monofluoromethylation showed inherent selectivity for the O‐alkylation of enolates, thus providing access to monofluoromethylethers, which are difficult to obtain by the direct electrophilic fluoromethylation of alcohols. Salt 1, X=BF4, x=0, y=3, in contrast leads to C‐alkylated products.
Highly Carbon-Selective Monofluoromethylation of β-Ketoesters with Fluoromethyl Iodide
作者:Tianqi Ding、Lvqi Jiang、Jie Yang、Yimin Xu、Guixiang Wang、Wenbin Yi
DOI:10.1021/acs.orglett.9b02175
日期:2019.8.2
A highly carbon-selective monofluoromethylation of a broad range of beta-ketoesters with fluoromethyl iodide under mild conditions is described. The uses of lithium tert-butoxide as the base and diglyme as the solvent made great contributions to the high C/O regioselectivity.
<scp>Monofluoromethyl‐Substituted</scp>
Sulfonium Ylides: Preparation,
<scp>Structure‐Reactivity</scp>
Study and Substrate Scope
<sup>†</sup>
作者:Xin Hong、Yafei Liu、Long Lu、Qilong Shen
DOI:10.1002/cjoc.202000206
日期:2020.11
Structure‐reactivity study of a family of electrophilic monofluoromethylating reagents based on sulfonium ylide skeleton with different steric hindrance and electron‐withdrawing properties was described. These studies led us to discover two highly reactive reagents 3 with a cyclic malonate backbone and 6 with an electron‐poor 1,1,1,5,5,5‐hexafluoropentane‐2,4‐dione backbone. The high reactivity of reagent