Highly chemoselective deoxygenation of N-heterocyclic <i>N</i>-oxides under transition metal-free conditions
作者:Se Hyun Kim、Ju Hyeon An、Jun Hee Lee
DOI:10.1039/d1ob00260k
日期:——
the most useful tools for synthesizing various N-heterocyclic compounds, the highly chemoselective deoxygenation of densely functionalized N-heterocyclic N-oxides has received much attention from the synthetic chemistry community. Here, we provide a protocol for the highly chemoselective deoxygenation of various functionalized N-oxides under visible light-mediated photoredox conditions with Na2-eosin
Asymmetric addition of chiral boron-ate complexes to cyclic iminium ions
作者:Maziar Mohiti、Constantinos Rampalakos、Kathryn Feeney、Daniele Leonori、Varinder K. Aggarwal
DOI:10.1039/c3sc52409d
日期:——
Boron-ate complexesderivedfrom enantioenriched secondary benzylic boronicesters and aryl lithiums have been reacted with quinolinium, pyridinium and dihydroisoquinolinium salts to give enantioenriched heterocyclic structures with very high diastereocontrol over two contiguous stereogenic centres (87: 1 3–99 : 1 dr; >95 : 5 es). The salts were derivedfrom the corresponding heterocycle and Troc-Cl