Palladium-Catalyzed Direct C−H Arylation of <i>N</i>-Iminopyridinium Ylides: Application to the Synthesis of (±)-Anabasine
作者:Alexandre Larivée、James J. Mousseau、André B. Charette
DOI:10.1021/ja710073n
日期:2008.1.1
Palladium-catalyzed direct C-H arylation of N-iminopyridinium ylides provides a powerful and versatile method for the synthesis of functionalized piperidines in good yields. Chemoselective functionalization of the pyridinium ring in the presence of a pyridine substituent is possible as exemplified by the expedient synthesis of anabasine in 61% overall yield over three steps.
Benzoyl Peroxide Promoted Radical<i>ortho</i>-Alkylation of Nitrogen Heteroaromatics with Simple Alkanes and Alcohols
作者:Lei Fang、Liangshun Chen、Jianjun Yu、Limin Wang
DOI:10.1002/ejoc.201403479
日期:2015.3
A catalytic amount of benzoylperoxide (BPO)-initiated cross-dehydrogenative coupling reaction of N-iminopyridine ylides with simplealkanes and alcohols leads to the corresponding 2-alkylpyridines with high regioselectivity in moderate to good yields without an additional reduction step to remove the activated group.
Copper-Catalyzed Direct Alkenylation of<i>N</i>-Iminopyridinium Ylides
作者:James J. Mousseau、James A. Bull、André B. Charette
DOI:10.1002/anie.200906020
日期:2010.2.1
A versatile Cu‐catalyzed direct CH alkenylation of N‐iminopyridinium ylides, compatible with several different copper sources (including a penny), provides a powerful and inexpensive method for the synthesis of functionalized pyridine derivatives. Chemoselective functionalization of halide‐containing compounds allows the synthesis of alkenyl pyridines containing reactive tethers for further functionalization
Exploiting the narrow gap of rearrangement between the substituents in the vicinal disubstitution reactions of diaryliodonium salts with pyridine N-sulfonamidates
The vicinaldisubstitution reactions of diaryliodoniumsalts with pyridine N-sulfonamidates to give o-pyridinium anilines were fully examined. A reaction pathway of N-arylation occurring at the amidate group followed by a radical rearrangement is proposed. The electronic effects of various substituents in this radical rearrangement were investigated.
Highly Efficient Synthesis of <i>O</i>-(2,4-Dinitrophenyl)hydroxylamine. Application to the Synthesis of Substituted <i>N</i>-Benzoyliminopyridinium Ylides
作者:Claude Legault、André B. Charette
DOI:10.1021/jo034456l
日期:2003.9.1
efficient two-step synthesis of O-(2,4-dinitrophenyl)hydroxylamine is described along with a comparison of its aminating efficiency with O-mesitylenesulfonylhydroxylamine (MSH). It was used in an expedient N-amination/benzoylation procedure involving various substituted pyridines, leading to polysubstituted N-benzoyliminopyridinium ylides, and the scope of its amination power was studied.