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- W4205098007 abstract "<p>The monoalkylation of N-methoxypyridinium salts with alkyl radicals generated from alkenes (via hydroboration with catecholborane), alkyl iodides (via iodine atom transfer) and xanthates is reported. The reaction proceeds under neutral conditions since no acid is needed to activate the heterocycle and does not require the use of an external oxidant. A rate constant for the addition of a primary radical to N-methoxylepidinium >107 M–1 s–1 was experimentally determined. This rate constant is more than one order of magnitude larger than the one measured for the addition of primary alkyl radical to protonated lepidine demonstrating the remarkable reactivity of methoxypyridinium salts towards radicals. The reaction could be extended to a three component carbopyridinylation of electron rich alkenes including enol esters, enol ethers and enamides.</p>" @default.
- W4205098007 created "2022-01-26" @default.
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- W4205098007 date "2021-05-21" @default.
- W4205098007 modified "2023-10-16" @default.
- W4205098007 title "Radical Chain Monoalkylation of Pyridines" @default.
- W4205098007 doi "https://doi.org/10.26434/chemrxiv.14518038.v2" @default.
- W4205098007 hasPublicationYear "2021" @default.
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