(2-Fluoroallyl)palladium complexes as intermediates in Pd-catalyzed Tsuji-Trost 2-fluoroallylations: Synthesis and reactivity
作者:Angelina Yu. Bobrova、Maxim A. Novikov、Igor A. Mezentsev、Yury V. Tomilov
DOI:10.1016/j.jfluchem.2020.109553
日期:2020.8
The first examples of π-(2-fluoroallyl)palladiumcomplexes were synthesized, isolated and characterized including chloride dimers, neutral chloride or cationic triflate complexes bearing PPh3 or SPhos as the ligands. Preliminary reactivity patterns indicating strong dependence of the chemoselectivity on “hardness” of the nucleophile and the ligand type were studied.
Gas-phase pyrolysis of 1-chloro-1-fluoro-2-methylcyclopropanes in the presence of SiO2 or Al2O3 with the formation of 2-chloro- or 2-fluorobuta-1,3-dienes
作者:N. V. Volchkov、M. B. Lipkind、M. A. Novikov、O. M. Nefedov
DOI:10.1007/s11172-014-0730-4
日期:2014.10
Gas-phase pyrolysis of of 1-chloro-1-fluoro-2-methylcyclopropanes in an empty or filled with quartz pieces flow-tube reactor at 430—460 °C gives 2-fluorobuta-1,3-dienes (in 42—75% yields), whereas pyrolysis in the presence of Al2O3 at 150—250 °C gives 2-chlorobuta-1,3-dienes as the major products (in 58—68% yield).
Copper(I)-catalyzed solvolysis of gem-chlorofluoro- and gem-bromofluorocyclopropanes. Preparation of 2-fluoroallylic ethers, esters and alcohols
作者:Maxim A. Novikov、Nikolai V. Volchkov、Maria B. Lipkind、Oleg M. Nefedov
DOI:10.1016/j.jfluchem.2015.09.001
日期:2015.12
Copper(I)-catalyzed solvolysis of gem-chlorofluoro- and gem-bromofluorocyclopropanes in MeOH, NaOAc/AcOH, NaOAc/DMF, HCO2Na/HCO2H or water/dioxane affords 2-fluoroallylic ethers, esters or alcohols in moderate to excellent yields. The reaction pathway involves isomerization of gem-fluorohalocyclopropanes to 2-fluoroallylic halides followed by nucleophilic substitution of a halide onto an O-nucleophile