Vesicular Monoamine Transporter Substrate/Inhibitor Activity of MPTP/MPP<sup>+</sup> Derivatives: A Structure–Activity Study
作者:D. Shyamali Wimalasena、Rohan P. Perera、Bruce J. Heyen、Inoka S. Balasooriya、Kandatege Wimalasena
DOI:10.1021/jm070875p
日期:2008.2.1
number of MPTP and MPP(+) derivatives that are suitable for the comparative neurotoxicity and complexIinhibition versus dopamine metabolism perturbation studies. Structure-activity studies with bovine chromaffin granule ghosts show that 3'-hydroxy-MPP(+) is one of the best known substrates for the vesicular monoamine transporter (VMAT). A series of compounds that combine the structural features of
The iridium-catalyzed asymmetric hydrogenation of 2-aryl allyl phthalimides to afford enantioenriched β-aryl-β-methyl amines is presented. Recently developed Ir-MaxPHOX catalysts are used for this enantioselective transformation. The mild reaction conditions and the feasible removal of the phthalimido group makes this catalytic method easily scalable and of great interest to afford chiral amines. The
Synthesis of N-Heterocycles by Dehydrogenative Annulation of N-Allyl Amides with 1,3-Dicarbonyl Compounds
作者:Zheng-Jian Wu、Shi-Rui Li、Hai-Chao Xu
DOI:10.1002/anie.201807683
日期:2018.10.22
construct cyclicstructures. Reported herein is an unprecedented synthesis of pyrrolidine and tetrahydropyridine derivatives through electrochemical dehydrogenative annulation of N‐allyl amides with 1,3‐dicarbonyl compounds. The electrolytic method employs an organic redox catalyst, which obviates the need for oxidizing reagents and transition‐metal catalysts. In these reactions, the N‐allyl amides serve
Characterization of a Series of 3-Amino-2-phenylpropene Derivatives as Novel Bovine Chromaffin Vesicular Monoamine Transporter Inhibitors
作者:Rohan P. Perera、D. Shyamali Wimalasena、Kandatege Wimalasena
DOI:10.1021/jm030004p
日期:2003.6.1
A series of 3-amino-2-phenylpropene (APP) derivatives have been synthesized and characterized as novel competitive inhibitors, with K-i values in the muM range, for the bovine chromaffin granule membrane monoamine transporter(s) (bVMAT). Although, these inhibitors are structurally similar to the bVMAT substrate tyramine, none of them were measurably transported into the granule. Structure-activity studies have revealed that, while the 3'- or 4'-OH groups on the aromatic ring enhance the inhibition potency, Me or OMe groups in these positions reduce the inhibition potency. Halogen substitution on the 4'-position of the aromatic ring causes gradual increase of the inhibition potency parallel to the electron donor ability of the halogen. Substituents on the NH2 as well as on the 3-position of the alkyl chain reduce the inhibition potency. Comparative structure-activity analyses of APP derivatives with tyramine and the neurotoxin 1-methyl-4-phenylpyridinium suggest that the flexibility of the side chain and the relative orientation of the NH2 group may be critical for the efficient transport of the substrate through the bVMAT. Comparable bVMAT affinities of these inhibitors to that of DA and other pharmacologically active amines suggest that they are suitable for the structure-activity and mechanistic studies of monoamine transporters and may also be useful in modeling the mechanism of action of amphetamine-related derivatives.
Copper-catalyzed radical oxytrifluoromethylation of alkenyl oximes at ambient temperature
作者:Xi-Tao Li、Ling Lv、Qiang-Shuai Gu、Xin-Yuan Liu
DOI:10.1016/j.tet.2018.08.037
日期:2018.10
A mild and efficient copper-catalyzed radical oxytrifluoromethylation reaction of alkenyl oximes was successfully developed. The method provides a straightforward access to a wide range of CF3-containing isoxazolines in good to excellent yields. (C) 2018 Elsevier Ltd. All rights reserved.