Catalytic C–F bond activation of geminal difluorocyclopropanes by nickel(<scp>i</scp>) complexes via a radical mechanism
作者:Jan Wenz、Christoph A. Rettenmeier、Hubert Wadepohl、Lutz H. Gade
DOI:10.1039/c5cc08950f
日期:——
Nickel(II) fluorido complexes bearing NNN-pincer ligands were found to be catalysts in the hydrodefluorination of geminal difluorocyclopropanes which undergo ring-opening to form the corresponding monofluoroalkenes in good yield and high Z-selectivities.
A convenient one-step synthesis of fluoroethylidene derivatives
作者:D. Chevrie、T. Lequeux、J.P. Demoute、S. Pazenok
DOI:10.1016/j.tetlet.2003.09.027
日期:2003.10
A convenientone-stepsynthesis of gem-monofluoroalkylolefins starting from aldehydes or ketones was developed. This method comprises the utilisation of 2-(1-fluoroethyl)sulfonyl-1,3-benzothiazole according to Julia's procedure and opens a new opportunity for the synthesis of fluoroalkylidene derivatives.
There is described a process for the preparation of compounds of formula I
in which
R is hydrogen, optionally substituted alkyl, optionally substituted alkenyl optionally substituted cycloalkyl, optionally substituted phenyl or optionally substituted heterocyclyl, and
R1 and R2 are hydrogen, an organic radical or together with the ring to which they are attached, form an optionally substituted ring, which may contain one or more hetero atoms,
which comprises reacting a compound of formula II
with a compound of formula III
in which the ring Q is an optionally substituted heteroaromatic ring, which optionally comprises one or more further hetero atoms and to which is optionally fused an optionally substituted ring.
作者:Abraham J. Jordan、Percie K. Thompson、Joseph P. Sadighi
DOI:10.1021/acs.orglett.8b02195
日期:2018.9.7
fluoroalkene formation. Alkynes can be converted to cis-(β-fluorovinyl)boronates by a reaction with an (NHC)copper(I) boryl generated in situ, followed by N-fluorobenzenesulfonimide (NFSI). This sequence gives rise to anti-Markovnikov fluorination products from terminal alkynes. Oxidation of a cis-(β-fluorovinyl)trifluoroboronate yields an α-fluoroketone, whereas a palladium-catalyzed Suzuki–Miyaura
Formation of a chiral 1-fluoro-2,2-diphenylcyclopropyl radical in the Barton decarboxylation reaction
作者:K. Gawronska、J. Gawronski、H. M. Walborsky
DOI:10.1021/jo00006a042
日期:1991.3
The chiral 1-fluoro-2,2-diphenylcyclopropyl radical (8), generated in the Barton decarboxylation reaction, was used as a probe to evaluate a variety of halogen and hydrogen atom donating reagents as radical traps.