A new entry to the construction of a quaternary carbon center having a fluorine atom – SN2′ reaction of γ-fluoroallylic alcohol derivatives with various cyanocuprates
作者:Tsutomu Konno、Atsushi Ikemoto、Takashi Ishihara
DOI:10.1039/c2ob25718a
日期:——
Treatment of γ-fluoroallylic phosphate with various lower-ordered cyanocuprates derived from Grignard reagents, organolithium, and organozincs gave the corresponding SN2Ⲡproducts having a fluorine atom at a quaternary carbon center in excellent yields. This system could be successfully extended to the chiral version, enantiomerically pure fluorine-containing materials also being obtained in high yield.
ONE-POT SYNTHESIS OF α-FLUORO-α,β-UNSATURATED ESTERS FROM CHLOROMALONIC ESTER AND CARBONYL COMPOUNDS USING “SPRAY-DRIED” POTASSIUM FLUORIDE
作者:Tomoya Kitazume、Nobuo Ishikawa
DOI:10.1246/cl.1981.1259
日期:1981.9.5
α-Fluoro-α,β-unsaturated esters were prepared by one-pot reaction between aldehydes or ketones and diethyl chloromalonate in the “spray-dried” potassium fluoride–sulfolane system.
Asymmetric Synthesis of Alkyl Fluorides: Hydrogenation of Fluorinated Olefins
作者:Sudipta Ponra、Jianping Yang、Sutthichat Kerdphon、Pher G. Andersson
DOI:10.1002/anie.201903954
日期:2019.7
chiral fluorine‐containing molecules is important for several scientific disciplines. We herein disclose a straightforward method for the preparation of chiral organofluorine molecules that is based on the iridium‐catalyzed asymmetric hydrogenation of trisubstituted alkenyl fluorides. This catalytic asymmetric process enables the synthesis of chiral fluorine molecules with or without carbonyl substitution