Metal-assisted synthesis of unsymmetrical magnolol and honokiol analogs and their biological assessment as GABAA receptor ligands by Biotage Initiator耐士科技
2015-02-09 15:23
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We present the synthesis of new derivatives of natural products magnolol (1) and honokiol (2) and their evaluation as allosteric ligands for modulation of GABAA receptor activity. New derivatives were prepared via metal assisted cross-coupling reactions in two consecutive steps. Compounds were tested by means of two-electrode voltage clamp electrophysiology at the a1b2c2 receptor subtype at low GABA concentrations.We have identified several compounds enhancing GABA induced current (IGABA) in the range similar or even higher than the lead structures. At 3 lM, compound 8g enhanced IGABA by factor of
443, compared to 162 and 338 of honokiol and magnolol, respectively. Furthermore, 8g at EC10–20 features
a much bigger window of separation between the a1b2c2 and the a1b1c2 subtypes compared to honokiol, and thus improved subtype selectivity.
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We herein report several highly active catalyst systems with thiadiazolidine 1-oxides as ligands for palladium in the MizorokieHeck reaction. Excellent yields of stilbenes derived from aryl iodides and bromides have been achieved using as little as 0.00002 mol % catalyst. The ligand/palladiumsystem can be stored as a stock solution open to air at room temperature with no observable loss of activity for a period of several months.
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耐士科技作为Biotage中国区总代理,以优质的服务为您提供Biotage全系产品以及相关的技术服务。
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