Dioxygen-Mediated Decarbonylative CH Alkylation of Heteroaromatic Bases with Aldehydes
作者:Subhasis Paul、Joyram Guin
DOI:10.1002/chem.201503809
日期:2015.12.1
An operationally simple and economical method for the direct alkylation of heteroaromaticbases employing readily available aldehydes as alkyl radical precursors and molecular oxygen as a reagent is presented. This simple transformation demonstrates a broad substrate scope with respect to aldehydes and nitrogen heterocycles, enabling the introduction of several medicinally important yet challenging
Silver-Catalyzed Minisci Reactions Using Selectfluor as a Mild Oxidant
作者:Jordan D. Galloway、Duy N. Mai、Ryan D. Baxter
DOI:10.1021/acs.orglett.7b02706
日期:2017.11.3
A new method for silver-catalyzed Minisci reactions usingSelectfluor as a mild oxidant is reported. Heteroarenes and quinones both participate in radical C–H alkylation and arylation from a variety of carboxylic and boronic acid radical precursors. Several oxidatively sensitive and highly reactive radical species are successful, providing structures that are challenging to access by other means.
Alkyl iodides and benzoyl peroxides provide a new general method of homolytic alkylation of protonated heteroaromatic bases. Yields are good and the substitution is selective in the positions ortho and para to the heteroatom.