Synthesis and neurite growth evaluation of new analogues of honokiol, a neolignan with potent neurotrophic activity
摘要:
A versatile synthetic route is reported towards the preparation of new analogues for potent neurotrophic agent biaryl-type lignan honokiol. A focused 24-membered library of derivatives containing five different groups at 5'-position of honokiol has been prepared in fair to good overall yields. Compared to the natural product, or to analogues with a short alkyl chain in this position, these new derivatives have lost most of the neurotrophic activity. (C) 2011 Elsevier Ltd. All rights reserved.
Silver-catalyzed cascade reaction of tosylmethyl isocyanide (TosMIC) with propargylic alcohols to (E)-vinyl sulfones: dual roles of TosMIC
作者:Haniya Bounar、Zhenhua Liu、Lin Zhang、Xiaoxue Guan、Zonglian Yang、Peiqiu Liao、Xihe Bi、Xingqi Li
DOI:10.1039/c5ob01129a
日期:——
An unprecedented silver-catalyzed cascade reaction of tosylmethyl isocyanide (TosMIC) with propargylicalcohols for the efficient synthesis of (E)-vinyl sulfones has been developed where TosMIC plays a dual role as both the reactant in the allenylation of propargylicalcohols and the sulfonyl source.
A versatile synthetic route is reported towards the preparation of new analogues for potent neurotrophic agent biaryl-type lignan honokiol. A focused 24-membered library of derivatives containing five different groups at 5'-position of honokiol has been prepared in fair to good overall yields. Compared to the natural product, or to analogues with a short alkyl chain in this position, these new derivatives have lost most of the neurotrophic activity. (C) 2011 Elsevier Ltd. All rights reserved.
Well-defined chiral dinuclear copper complexes in enantioselective propargylic substitution: For a long-standing supposition on binuclear mechanism
作者:Qilong Cai、Houqiang Rao、Shi-Jun Li、Yu Lan、Kuiling Ding、Xiaoming Wang
DOI:10.1016/j.chempr.2023.09.006
日期:2024.1
frequently been proposed as active intermediates. Herein, we report a series of binuclear copper catalysts supported by chiral benzo [c] cinnoline dioxazoline frameworks, which demonstrated high efficiency in (dynamic) kinetic resolution of propargylic alcohol derivativesvia propargylic substitution. Mechanistic investigations suggested that the binuclear Cu core shows a bifunctional role in coordination with