Ni-Catalyzed Alkenylation of Triazolopyridines: Synthesis of 2,6-Disubstituted Pyridines
作者:Sheng Liu、James Sawicki、Tom G. Driver
DOI:10.1021/ol301606y
日期:2012.7.20
A synthetic strategy to access 2,6-disubstitutedpyridines from triazolopyridines through a regioselective nickel-catalyzed alkenylation reaction of the C7–H bond is described. The N2 fragment embedded in the resulting C–H functionalized triazolopyridine can be readily excised using acidic or oxidative conditions to unmask the pyridine.
Compounds with a pyridoisoquinolinone core often appear as members of the protoberberine alkaloid family. Traditional methods to construct this framework normally rely on manipulation of sophisticated reactants. Herein, a palladium-catalyzed reaction of readily available pyridotriazoles and o-bromo/pseudohalo benzaldehydes is described, which provides a modular approach to pyridoisoquinolinone derivatives
Copper(II) Acetate‐Catalyzed Synthesis of Phosphorylated Pyridines
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Denitrogenative C−P Coupling between Pyridotriazoles and P(O)H Compounds
作者:Ruwei Shen、Chao Dong、Jianlin Yang、Li‐Biao Han
DOI:10.1002/adsc.201800909
日期:2018.11.5
A new inexpensive copper‐catalyzed denitrogenative C−P coupling reaction of pyridotriazoles with P(O)H compounds has been developed. The reaction proceeds via a process of copper‐catalyzed P(O)−H insertion into the pyridyl carbene intermediates generated in situ from pyridotriazoles. This reaction provides a new and effective method for the synthesis of a variety of 2‐picolylphosphoryl compounds.
Aerobic Copper Catalysis for Tandem Oxy-<i>N</i>-alkenylation of [1,2,3]Triazolo[1,5-<i>a</i>]pyridines
作者:Sreekumar Pankajakshan、Wei Li Ang、Sivarampanicker Sreejith、Mihaiela Corina Stuparu、Teck-Peng Loh
DOI:10.1002/adsc.201600580
日期:2016.10.6
N‐Alkenylated triazolinone ylides were generated through copper‐catalyzed oxy‐N‐alkenylation of triazolopyridines. The mechanistic course of this aerobictandem reaction has been experimentally elucidated and primary photophysical data of the ylide products are also given.