<i>N-n</i>-Alkylnicotinium Analogs, a Novel Class of Nicotinic Receptor Antagonists: Interaction with α4β2* and α7* Neuronal Nicotinic Receptors
作者:Lincoln H. Wilkins、Vladimir P. Grinevich、Joshua T. Ayers、Peter A. Crooks、Linda P. Dwoskin
DOI:10.1124/jpet.102.043349
日期:2003.1.1
subtype, with the exception of N-n-octylnicotinium iodide (NONI). The most potent analog was N-n-decylnicotinium iodide (NDNI; Ki = 90 nM). In contrast, none of the analogs in this series exhibited high affinity for the [3H]methyllycaconitine binding site, thus indicating low affinity for the alpha7* nAChR. The C8analog, NONI, had low affinity for S-(-)-[3H]nicotine binding sites but was a potent inhibitor
Modified Fry Cyanation of a Chiral Pyridinium Salt: Asymmetric Syntheses of (-)-Coniine and (-)-Solenopsin A
作者:Van Ha Vu、Laurie-Anne Jouanno、Adèle Cheignon、Thierry Roisnel、Vincent Dorcet、Sourisak Sinbandhit、Jean-Pierre Hurvois
DOI:10.1002/ejoc.201300595
日期:2013.8
The synthesis of chiral 2-cyano-Δ4-tetrahydropyridine 5 was carried out in 85 % yield through a modified two-step Fry reductive cyanation of pyridinium salt (+)-3c that used lithium triethylborohydride as the hydride donor. An alkylation–reduction sequence provided 2-alkyl-substituted tetrahydropyridines (+)-10a and (+)-10b in 72–75 % yield after chromatographic purification. This protocol has been
A Convenient Route to Enantiomerically Pure 2-Substituted Methyl Glycerate Derivatives
作者:Steven V. Ley、Patrick Michel、Claudio Trapella
DOI:10.1021/ol035567+
日期:2003.11.1
[reaction: see text] The lithium enolate of a butanediacetal-protected glycerate derivative undergoes efficient and diastereoselective alkylation to afford a new fully substituted stereogenic center. These compounds may be elaborated to stable 2-substituted glyceraldehyde derivatives.
Insecticidal synergism with the pyrethrins: Studies on the relationship between chemical structure and synergistic activity in the 3 :4-methylenedioxyphenyl compounds
作者:B. P. Moore、P. S. Hewlett
DOI:10.1002/jsfa.2740091007
日期:1958.10
A series of 3 : 4-methylenedioxyphenyl compounds of graded complexity have been synthesized and tested for synergism with the pyrethrins against adult Black Fungus beetles, Alphitobius laevigatus. The results establish the minimal molecular requirements for such synergism and point to the methylene group as the seat of activity. The effects of stepwise modification of the minimal synergist molecule
Homogeneous catalysis, heterogeneous recycling: a new family of branched molecules with hydrocarbon or fluorocarbon chains for the Friedländer synthesis of quinoline under solvent-free conditions
作者:Lei Fang、Jianjun Yu、Ying Liu、Anyin Wang、Limin Wang
DOI:10.1016/j.tet.2013.10.029
日期:2013.12
A new family of branched catalysts with hydrocarbon or fluorocarbon chains was used to catalyze Friedländer reaction between 2-aminoarylketones and α-methylene ketones under solvent-free conditions in good to excellent yields. The catalysts exhibit temperature-dependent solubility and such a thermomorphic character allows them to be recovered by filtration conveniently at room temperature and reused