- Studies on ambiphilic radicals generated from the ester of N-hydroxy-2-thiopyridone
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Seven different α-carbethoxyalkyl radicals have been generated from Barton esters and their behaviour towards different olefins have been studied to show their philicity.
- Borah,Sarma
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p. 592 - 596
(2007/10/03)
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- Behaviour of ot-carbethoxy radical generated from the ester of N-hydroxy-2-thiopyridone
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Studies on the behaviour of α-carbethoxy radical generated from the ester of N-hydroxy-2-thiopyridone is described.
- Borah, Ruli,Sarma, Jadab C.
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p. 533 - 535
(2007/10/03)
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- Rate Constants for Halogen Atom Transfer from Representative α-Halocarbonyl Compounds to Primary Alkyl Radicals
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Rate constants for halogen atom transfer from diethyl methyliodomalonate (7a), iodoacetonitrile (7b), ethyl 2-methyl-2-iodopropanoate (7c), ethyl iodoacetate (7d), diethyl methylbromomalonate (7e), and ethyl bromoacetate (7f) to simple primary alkyl radicals have been studied by a variety of competition reactions.The Arrhenius functions for halogen atom transfer to the undecyl radical from halides 7d and 7f are log (kI, M-1 s-1) = 10.4 - 4.4/θ and log (kBr, M-1 s-1) = 10.4 - 8.2/θ, respectively.The rate constants for halogen atom transfer to a primaryradical from the series of compounds 7a-7f at 50 deg C are 1.8 x 109, 1.7 x 109, ca. 6 x 108, 2.6 x 107, 1.0 x 106, and 7.0 x 104 M-1 s-1, respectively.The kinetic values are useful for the planning of synthetic methods that incorporate an atom transfer-cyclization process.
- Curran, Dennis P.,Bosch, Eric,Kaplan, Jere,Newcomb, Martin
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p. 1826 - 1831
(2007/10/02)
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