stereocenters bearing both a trifluoromethylthio (SCF3) group and a cyano group has been realized, through asymmetric organophosphine-catalyzed Mannich-typereactions. The products were obtained in high yields and moderate to high enantioselectivities. Two diastereoisomers could be isolated from each reaction (overall 25 examples), rendering this approach a viable opportunity for molecular diversity generation
2,4,4,6-Tetrabromocyclohexa-2,5-dienone in the presence of triphenylphosphine as a specific reagent for nucleophilic substitution in cyanohydrins
作者:Elena D. Matveeva、Tatyana A. Podrugina、Elena V. Tishkovskaya、Nikolai S. Zefirov
DOI:10.1070/mc2003v013n06abeh001830
日期:2003.1
A convenient method for the synthesis of alpha-bromonitriles from aliphatic cyanohydrins using the 2,4,4,6-tetrabromocyclohexa-2,5-dienone complex with triphenylphosphine was developed.
Histamine H1 receptor ligands
作者:Krzysztof Walczyński、Roman Guryn、Obbe P Zuiderveld、Ming-Qiang Zhang、Henk Timmerman
DOI:10.1016/s0014-827x(00)00087-2
日期:2000.11
New 2-[2-(phenylamino)thiazol-4-yl]ethanamine and 2-(2-benzhydrylthiazol-4-yl)ethanamine derivatives were prepared and tested in vitro as H-1 receptor antagonists. The compounds with 2-phenylamino substitution with meta-halide substituents at the phenyl ring, showed weak H-1-antagonistic activity (pA(2): 4.62-5.04) and this activity was completely lost in the case of meta-methyl substituent (pA(2) < 4). When the phenylamino group was replaced by benzhydryl groups of classic antihistamines, the resulting compounds exhibited slightly improved H-1-antagonistic activity (at the meta-position pA(2): 6.38-6.15; at the para-position pA(2): 6.04-5.87). (C) 2000 Elsevier Science S.A. All rights reserved.
Potential Modes of Interaction of 9-Aminomethyl-9,10-dihydroanthracene (AMDA) Derivatives with the 5-HT<sub>2A</sub> Receptor: A Ligand Structure-Affinity Relationship, Receptor Mutagenesis and Receptor Modeling Investigation
作者:Scott P. Runyon、Philip D. Mosier、Bryan L. Roth、Richard A. Glennon、Richard B. Westkaemper
DOI:10.1021/jm800771x
日期:2008.11.13
The effects of 3-position substitution of 9-aminomethyl-9,10-dihydroanthracene (AMDA) on 5-HT2A receptor affinity were determined and compared to a parallel series of DOB-like 1-(2,5-dimethoxyphenyl)-2-aminopropanes substituted at the 4-position. The results were interpreted within the context of 5-HT2A receptor models that suggest that members of the DOB-like series call bind to the receptor in two distinct modes that correlate with the compounds' functional activity. Automated ligand docking and molecular dynamics suggest that all of the AMDA derivatives, the parent of which is a 5-HT2A antagonist, bind in a fashion analogous to that for the sterically demanding antagonist DOB-like compounds. The failure of the F340(6.52)L mutation to adversely affect the affinity of AMDA and the 3-bromo derivative is consistent with the proposed modes of orientation. Evaluation of ligand-receptor complex models suggest that a valine/threonine exchange between the 5-HT2A and D-2 receptors may be the origin of selectivity for AMDA and two substituted derivatives.