A Facile Synthesis of 4-Benzylpyridines by Regiospecific Addition of Substituted Benzylic Griganard Reagents to Pyridinium Salts
作者:Min-Jen Shiao、Win-Long Chia
DOI:10.1080/00397919108016762
日期:1991.2
Abstract Substituted 4-benzylpyridines are prepared by regiospecific γ-addition of substituted benzylic Grinard reagents to pyridinium salts in fairly good yeilds.
Four‐Selective Pyridine Alkylation via Wittig Olefination of Dearomatized Pyridylphosphonium Ylides
作者:Patrick J. Fricke、Ryan D. Dolewski、Andrew McNally
DOI:10.1002/anie.202109271
日期:2021.9.20
to synthesize alkylated pyridines are valuable because these structures are prevalent in pharmaceuticals and agrochemicals. We have developed a distinct approach to construct 4-alkylpyridines using dearomatized pyridylphosphonium ylide intermediates in a Wittig olefination-rearomatization sequence. Pyridine N-activation is key to this strategy, and N-triazinylpyridinium salts enable coupling between
Regio- and Chemoselective Addition of Mixed Copper, Zinc Benzylic Organometallics to Functionalized Pyridinium Salts: A Facile Synthesis of Functionalized 4-Benzylpyridines
2′,3-Disubstituted 4-benzylpyridines 4 were synthesized in good yield by reaction of mixed copper, zinc benzylic organometallics 1 with 3-substituted 1-(ethoxycarbonyl)pyridinium chlorides 2 followed by sulfur oxidation under reflux in decalin.
Substituted tetrahydropyridine derivatives acting on 5-HT receptors
申请人:Merck Sharp & Dohme Ltd.
公开号:US06054469A1
公开(公告)日:2000-04-25
Compounds having formula I, or salts or prodrugs thereof: ##STR1## are selective agonists of the 5-HT.sub.1D.alpha. receptor and are useful in the treatment of migraine and associated conditions.
Synthesis of 4-benzylpyridines via Pd-catalyzed CH<sub>3</sub>-arylation of 4-picoline
作者:Jing Wu、Dadian Wang、Xiang Chen、Qingwen Gui、Hua Li、Ze Tan、Genping Huang、Guangwei Wang
DOI:10.1039/c7ob01726j
日期:——
A highly efficient synthesis of 4-benzylpyridines was developed via Pd-catalyzed C(sp3)–H arylation between 4-picoline and aryl halides. It was found that the best yields were achieved with a simple Pd(PPh3)4 catalyst and Cs2CO3 as the base.