Benzylation of heterocyclic N-oxides via direct oxidative cross-dehydrogenative coupling with toluene derivatives
作者:L. Wan、K. Qiao、X. N. Sun、Z. C. Di、Z. Fang、Z. J. Li、K. Guo
DOI:10.1039/c6nj02560a
日期:——
A novel cross-dehydrogenative coupling (CDC) of heterocyclic N-oxides with toluene derivatives has been discussed, allowing for the facile synthesis of a broad range of structurally diverse C1-benzyl quinoline N-oxides, isoquinoline N-oxides and pyridine N-oxides, including two methylated quinoline N-oxides in particular. This protocol not only extends the application of toluenes in synthetic organic
Visible Light-Mediated Decarboxylative Alkylation of Pharmaceutically Relevant Heterocycles
作者:Alexandra C. Sun、Edward J. McClain、Joel W. Beatty、Corey R. J. Stephenson
DOI:10.1021/acs.orglett.8b01250
日期:2018.6.15
A net redox-neutral method for the decarboxylative alkylation of heteroarenes usingphotoredoxcatalysis is reported. Additionally, this method features the use of simple, commercially available carboxylicacid derivatives as alkylating agents, enabling the facile alkylation of a variety of biologically relevant heterocyclic scaffolds under mild conditions.
Photocatalyzed
<i>ortho</i>
‐Alkylation of Pyridine
<i>N</i>
‐Oxides through Alkene Cleavage
作者:Wang Zhou、Tomoya Miura、Masahiro Murakami
DOI:10.1002/anie.201801305
日期:2018.4.23
A photocatalyzed reaction of pyridine N‐oxides with alkenes gives ortho‐alkylated pyridines with cleavage of the carbon–carbon double bond. Benzyl and secondary alkyl groups are incorporated at the ortho position of pyridines in one pot.