Mechanistic Analysis of Oxidative C-H Cleavages Using Inter- and Intramolecular Kinetic Isotope Effects.
Mechanistic Analysis of Oxidative C-H Cleavages Using Inter- and Intramolecular Kinetic Isotope Effects.
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DOI:
10.1016/j.tet.2009.10.088
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发表时间:
2009-12-26
期刊:
影响因子:
2.1
通讯作者:
Floreancig PE
中科院分区:
文献类型:
--
作者:
Jung HH;Floreancig PE
A series of monodeuterated benzylic and allylic ethers were subjected to oxidative carbon–hydrogen bond cleavage to determine the impact of structural variation on intramolecular kinetic isotope effects in DDQ-mediated cyclization reactions. These values are compared to the corresponding intermolecular kinetic isotope effects that were accessed through subjecting mixtures of non-deuterated and dideuterated substrates to the reaction conditions. The results indicate that carbon–hydrogen bond cleavage is rate determining and that a radical cation is most likely a key intermediate in the reaction mechanism.
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