Palladium-Catalyzed Cyanation Reactions of Thiophene Halides
The described method provides an efficient cyanation reaction of thiophene halides using tris(dibenzylidene-acetone)dipalladium(0), 1,1′-bis- (diphenylphosphino)ferrocene) and zinc powder as the catalyst system and Zn(CN)2 as the cyanide source
Erker, Thomas,Nemec, Stephanie
p. 23 - 25
(2007/10/03)
RADICAL IONS 49. Redox Reactions of some Thiphene Derivatives
Trimethylsilyl- and cyano-substituted thiophenes can be reduced in THF using potassium and the resulting radical anions can be characterized by their electron spin resonance spectra.Attempts to oxidize thiophene derivatives with low first ionization potentials to their radical cations using the ALCl3/H2CCl2 oxidizing system failed except for dithienyldisulfide, the radical cation of which rearranges under the reaction conditions to the one of dithieno-p-dithiin.The photoelectron and electron spin resonance spectroscopic assignments are supported by MNDO as well as parametrized HMO calculations.
Bock, H.,Roth, B.
p. 211 - 224
(2007/10/02)
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