Discovery, cocrystallization and biological evaluation of novel piperidine derivatives as high affinity Ls-AChBP ligands possessing α7 nAChR activities
pyridine ring was also proposed to influence the binding conformation of the compounds. Notably, two enantiomers of compound 2 showed opposite functions toward α7 nAChR and compound (S)-2 showed sub-nanomolar affinity (Ki = 0.86 nM) on Ls-AChBP and partial agonism (pEC50 = 4.69 ± 0.11,Emax = 36.1%) on α7 nAChR with reasonable pharmacokinetics (PK) properties and fine ability of blood-brain-barrier (BBB)
Pd-Catalyzed Nucleophilic Fluorination of Aryl Bromides
作者:Hong Geun Lee、Phillip J. Milner、Stephen L. Buchwald
DOI:10.1021/ja5009739
日期:2014.3.12
On the basis of mechanism-driven reaction design, a Pd-catalyzed nucleophilic fluorination of aryl bromides and iodides has been developed. The method exhibits a broad substrate scope, especially with respect to nitrogen-containing heteroaryl bromides, and proceeds with minimal formation of the corresponding reduction products. A facilitated ligand modification process was shown to be critical to the success of the reaction.
Addition of α-Lithiated Nitriles to Azaheterocycles
作者:Corey Anderson、Jesus Moreno、Sabine Hadida
DOI:10.1055/s-0033-1340680
日期:——
The addition of alpha-deprotonated nitriles to azaheterocycles followed by rearomatization is described. A simple two-step, one-pot procedure for the sequence is also presented.
Reactions of β-fluorovinamidinium salt with bifunctional hetero nucleophiles. A new synthetic route to fluorinated heterocycles
作者:Xifeng Shi、Takashi Ishihara、Hiroki Yamanaka、John T. Gupton
DOI:10.1016/0040-4039(95)00076-o
日期:1995.2
beta-Fluorovinamidinium salt (2), readily prepared from N-(2,3,3-trifluoro-1-propenyl)trimethylammonium iodide (1) and diethylamine, reacted with bifunctional hetero nucleophiles such as amidine and guanidine hydrochlorides in the presence of a base to afford regiospecifically monofluorinated pyrimidines 4 in good yields. The one-pot procedure starting from 1 was applicable for synthesizing heterocyclic compounds 4 in almost comparable yields.