Reaction of β-alkylthiopropionyl tetrafluoroborates with alkenes
摘要:
The reaction of beta-alkylthiopropionyl tetrafluoroborates with alkenes results in formation of 6-membered cyclic sulfonium salts. Succeeding cleavage of sulfonium salts by bases affords the corresponding 5-alkythiopent-1-en-3-ones.
Reactions of β-Ethylsulfanylpropionyl Tetrafluoroborate with Electron-Rich Aromatics: A Novel Synthesis of Aryl Vinyl Ketones
作者:Mikhail V. Lebedev、Valentine G. Nenajdenko、Elizabeth S. Balenkova
DOI:10.1055/s-1998-1993
日期:1998.1
A new synthesis of aryl vinyl ketones is described. The acylation of active aromatics with the complex of β-ethylsulfanylpropionyl fluoride 1 and boron trifluoride leads to formation of 1-aryl-3-(ethylsulfanyl)propan-1-ones. Subsequent methylation with methyl triflate and elimination with an aqueous solution of KHCO3 results in formation of aryl vinyl ketones in 86-99% yield.
Reaction of β-ethylsulfanylpropionyl tetrafluoroborate with halogen-containing aromatic and heteroaromatic compounds
作者:Mikhail V. Lebedev、Valentine G. Nenajdenko、Elizabeth S. Balenkova
DOI:10.1016/s0040-4020(98)00231-2
日期:1998.5
Acylation of halogen-containing electron-rich aromatic and heteroaromaticcompounds with β-ethylsulfanylpropionyl tetrafluoroborate leads to the formation of 6-membered sulfoniumsalts fused with aromatic or heteroaromatic rings. Base induced cleavage of sulfoniumsalts gave ethylsulfanyl substituted aryl vinyl ketones. Cyclic sulfoniumsalts can also be converted into corresponding thiopyran-4-ones
作者:M. V. Lebedev、V. G. Nenaidenko、K. I. Smolko、E. S. Balenkova
DOI:10.1023/a:1012390420551
日期:——
Cyclopropyl-substituted alkenes react with complexes formed by boron trifluoride and 3-(ethylthio)propionyl fluoride and 2-(ethylthio)acetyl fluoride to give ketones containing an ethylthio group. In most cases the reaction is not accompanied by opening of the three-membered ring or rearrangements.
Nenaidenko; Verteletskii; Lebedev, Russian Journal of Organic Chemistry, 1998, vol. 34, # 7, p. 974 - 980
Reactions of acylsulfonium salts with unsaturated hydrocarbons
作者:Valentine G Nenajdenko、Mikhail V Lebedev、Elisabeth S Balenkova
DOI:10.1016/s0040-4020(01)00897-3
日期:2001.10
The reactions of acylsulfonium salts, obtained from β-(ethylsulfanyl)propionyl fluoride and (ethylsulfanyl)acetyl fluoride, with various unsaturatedhydrocarbons proceed through the formation of six- and five-membered cyclic sulfonium salts, respectively. Succeeding cleavage of sulfonium salts by bases affords the corresponding sulfur containing unsaturated ketones.