Radical hydroxymethylation of alkyl iodides using formaldehyde as a C1 synthon.

Radical hydroxymethylation of alkyl iodides using formaldehyde as a C1 synthon.
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DOI:
10.1039/d1sc03083c
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发表时间:
2021-08-11
期刊:
影响因子:
8.4
通讯作者:
Leonori D
Leonori D
中科院分区:
化学1区
文献类型:
--
作者:
Caiger L;Sinton C;Constantin T;Douglas JJ;Sheikh NS;Juliá F;Leonori D

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Radical hydroxymethylation using formaldehyde as a C1 synthon is challenging due to the reversible and endothermic nature of the addition process. Here we report a strategy that couples alkyl iodide building blocks with formaldehyde through the use of photocatalysis and a phosphine additive. Halogen-atom transfer (XAT) from α-aminoalkyl radicals is leveraged to convert the iodide into the corresponding open-shell species, while its following addition to formaldehyde is rendered irreversible by trapping the transient O-radical with PPh3. This event delivers a phosphoranyl radical that re-generates the alkyl radical and provides the hydroxymethylated product. Halogen-atom transfer (XAT) based on phosphoranyl radical chemistry enables the hydroxymethylation of alkyl iodides with formaldehyde.
DOI: 10.1039/d0sc04387g
发表时间: 2020-10-20
期刊: Chemical science
影响因子: 8.4
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