A Facile P-C Bond Cleavage of 2-Fluoro-2-Phosphonyl-1,3-Dicarbonyl Compounds on Silica Gel
摘要:
alpha-Fluoro-beta-keto esters and alpha-fluoromalonates were prepared by the P-C bond cleavage of 2-fluoro-2-phosphonyl-1,3-dicarbonyl compounds on wet silica gel.
FACILE SYNTHESIS OF α-FLUORO-β-KETOESTERS FROM POLYFLUOROALKENES
作者:Nobuo Ishikawa、Akio Takaoka、Hiroshi Iwakiri、Satoshi Kubota、S. R. F. Kagaruki
DOI:10.1246/cl.1980.1107
日期:1980.9.5
2-chloro-1,2,2-trifluoroethyl ketones and aryl 1,2,2,2-tetrafluoroethyl ketones were respectively prepared by the Friedel–Crafts acylation of trifluoroethene and by the Grignard arylation of N,N-diethyl-1,2,2,2-tetrafluoropropionamide, a hydrolyzed product of hexafluoropropene–diethylamine adduct. These alkyl and aryl polyfluoroalkyl ketones were subjected to base-induced dehydrohalogenation, and resulting
Synthesis of Highly Functionalized Biaryls by Condensation of 2-Fluoro-1,3-bis(silyloxy) 1,3-Dienes with 3-Cyanochromones and Subsequent Domino “Retro-Michael/Aldol/Fragmentation”
The Me3SiOTf-mediated condensation of 1-ethoxy-2-fluoro-1,3-bis(trimethylsilyloxy) 1,3-dienes with 3-cyanochromones afforded 3-cyano-2-(4-ethoxy-3-fluoro-2,4-dioxobutyl)-chroman-4-ones. Their reaction with triethylamine afforded fluorinated azaxanthones or biaryls. The product distribution depends on the structure of the diene. The formation of the biaryls can be explained by an unprecedented domino "retro-Michael/aldol/fragmentation" reaction.
P-C Bond Cleavage of Triethyl 2-Fluoro-3-oxo-2-phosphonoacetates with Magnesium Chloride: A Synthesis of α-Fluoro-β-keto Esters
作者:Dae Young Kim、Jin Seok Choi、Dae Yong Rhie
DOI:10.1080/00397919708003055
日期:1997.3
P-C bond cleavage of triethyl 2-fluoro-3-oxo-2-phosphonoacetates in the presence of magnesium chloride provides a synthetic route to alpha-fluoro-beta-keto esters.
Oxidation of fluoroalkyl-substituted carbinols by the Dess-Martin reagent