The functionalization of saturated hydrocarbons. Part 24. The use of tert-butyl hydroperoxide: GoAggIV and GoAggV.
作者:Derek H.R. Barton、Warinthorn Chavasiri
DOI:10.1016/s0040-4020(01)80734-1
日期:1994.4
The use of tert-butyl hydroperoxide as an oxidant in Gif-type systems (GoAggIV and GoAgfV) catalyzed by various Fe(III) species is examined. Regioselectivity studids of these systems have revealed several characteristics similar to those observed for other prdviously reported Gif-type reactions. A common rdaction pathway for the GoAggIV and GoAggV oxidation systems and other Gif-type reactions (from
Photoinduced direct 4-pyridination of C(sp3)–H Bonds
作者:Tamaki Hoshikawa、Masayuki Inoue
DOI:10.1039/c3sc51080h
日期:——
Direct substitution of hydrogen in C(sp3)âH bonds by 4-pyridine was achieved by employing benzophenone and 4-cyanopyridine in aqueous acetonitrile under photo-irradiating conditions. This simple and mild 4-pyridination proceeds in a highly chemoselective manner especially at benzylic C(sp3)âH bonds without affecting polar functional groups, and enables intermolecular formation of sterically hindered bonds between alkylaromatics and 4-pyridine. The present methodology thus serves as a powerful tool for construction of biologically active and functional molecules with 4-pyridine substructures.
The functionalization of saturated hydrocarbons. Part 25. Ionic substitution reactions in GoAggIV chemistry: the formation of carbon-halogen bonds
作者:Derek H.R. Barton、Stéphane D. Bévière、Warinthorn Chavasiri
DOI:10.1016/s0040-4020(01)80735-3
日期:1994.4
GoAggIV chemistry (Fe (III) species, tert-butyl hydroperoxide in a mixture of pyridine and acetic acid) in the presence of LiCl can transform saturated hydrocarbons efficiently into the corresponding alkyl chlorides. The transformation into monosubstituted alkyl derivatives by “ionic trapping” reagents arising from the interception of the first intermediate of the system supports the presence of a
Studies on tertiary amine oxides. LXXXII. The reaction of 1-oxido-4(or 2)-pyridinediazonium tetrafluoroborate with olefins in the presence of palladium complex.
1-Oxido-4-pyridinediazonium tetrafluoroborate (4-PFB) reacts with olefins (cyclopentene, styrene, ethyl acrylate, indene, cyclohexene, cyclooctene, 1-octene and 1-dodecene) in the presence of tris(dibenzylideneacetone)dipalladium to afford the corresponding alkenylated products (1, 2, 3, 4, 5, 6, 7 and 8) in good yields.1, 2, 3, 5-Oxatriazolo[5, 4-α]pyridinium tetrafluoroborate (2-PFB) also reacts with cyclopentene and styrene to give 2-cyclopentenylpyridine 1-oxides (13 and 14) and (E)-2-(α-styryl)pyridine 1-oxide (15), respectively, in low yields.
The Fe(III)-catalyzed functionalization of saturated hydrocarbons by tert-butyl hydroperoxide: Mechanistic studies on the role of dioxygen
作者:Derek H.R. Barton、Stéphane D. Bévière、Warinthorn Chavasiri、Darío Doller、Bin Hu
DOI:10.1016/s0040-4039(00)61120-6
日期:1992.9
The Fe(III)-catalyzed ketonization of saturatedhydrocarbons by tert-butyl hydroperoxide (TBHP) in pyridine-acetic acid or acetonitrile solution follows the reaction pathway alkane → alkyl hydroperoxide → ketone or alcohol. Dioxygen (O2) is the precursor of the oxygen atoms in the alkyl hydroperoxide, the alcohol, and the ketone.