Alkylation of remote non-activated δ-carbon atoms: Addition of δ-carbon radicals, generated by 1,5-hydrogen transfer in alkoxy radical intermediates, to activated olefins
作者:Goran Petrović、Živorad Čeković
DOI:10.1016/s0040-4020(98)01110-7
日期:1999.1
A free radical introduction of a functionalized alkyl chain onto remote non-activated δ-carbon atoms (Michael type alkylation) has been achieved. Photolysis of suitable alkyl nitrites involves generation of δ-alkyl radicals and in the presence of radicophilic olefins, intermolecular addition takes place and affords δ-alkylated products in 36–80% yields. δ-Alkylation is also achieved in the reaction
Free radical alkylation of the remote nonactivated δ-carbon atom
作者:Goran Petrović、Živorad Čeković
DOI:10.1016/s0040-4039(96)02357-x
日期:1997.1
A freeradical introduction of functionalized alkyl chains into the δ-carbon atom (Michael type alkylation) of alkyl nitrites and alkyl benzenesulfenic-O-esters was achieved.
The photolysis of cycloalkyl nitrites esters: The radical intermediates as studied by E.P.R.
作者:Loris Grossi
DOI:10.1016/s0040-4020(97)00299-8
日期:1997.5
The radical intermediates involved in the photolysis of alicyclic nitrites have been identified by EPR spectroscopy. In particular, cyclobutyl nitrite allows detection of the 2-pyrrolidinone-1-oxyl whose formation involves a 1,5-exo ring closure process which the 4-nitroso-1-acyl radical intermediate can undergo. Furthermore, experimental evidence supports for the formation of the alkyl alkoxy nitroxides