描述了一种用于合成偕二氟烯烃的有效脱羧/脱氟烷基化反应,为将含有 α-吸电子基团的具有挑战性的烷基片段安装到 α-三氟甲基烯烃中提供了一种通用方法。机理研究表明,该过程涉及在没有过渡金属催化剂或光催化的情况下的 S N 2' 型合成路线。此外,该协议可以很容易地扩大规模,并成功应用于生物活性分子的修饰,从而补充了获得结构通用的gem-二氟烯烃的方法。
A simple base-mediated synthesis of diverse substituted ring-fluorinated 4H-pyrans (monofluorinated 4H-pyrans) from trifluoromethylated alkenes and 1,3-dicarbonyl compounds was developed.
2-trifluoromethyl-1-alkenes and alkynes with the aid of Et3SiH provides 1,1-difluoro-1,4-dienes under mild reaction conditions. This reaction involves selective allylic C(sp3)–F bond activation via β-fluorine elimination from nickelacyclopentenes.
A simple base-mediated tandem SN2'/SNV reaction of readily available -trifluoromethyl-, -unsaturated carbonylcompounds with N-tosylated 2-aminomalonates was developed, which provide an efficient access to functionalized tetrasubstituted 2-fluoro-2-pyrrolines in good to...
Nickel-catalyzed allylic defluorinative alkylation of trifluoromethyl alkenes with reductive decarboxylation of redox-active esters
作者:Xi Lu、Xiao-Xu Wang、Tian-Jun Gong、Jing-Jing Pi、Shi-Jiang He、Yao Fu
DOI:10.1039/c8sc04335c
日期:——
Herein, we report a nickel-catalyzed allylic defluorinative alkylation of trifluoromethyl alkenes throughreductive decarboxylation of redox-active esters. The present reaction enables the preparation of functionalized gem-difluoroalkenes with the formation of sterically hindered C(sp3)–C(sp3) bonds under very mild reaction conditions, while tolerating many sensitive functional groups and requiring