Straightforward and effective synthesis of γ-aminobutyric acid transporter subtype 2-selective acyl-substituted azaspiro[4.5]decanes
作者:Xiaofeng Ma、Hodney Lubin、Enikő Ioja、Orsolya Kékesi、Ágnes Simon、Ágota Apáti、Tamás I. Orbán、László Héja、Julianna Kardos、István E. Markó
DOI:10.1016/j.bmcl.2015.11.100
日期:2016.1
Supply of major metabolites such as gamma-aminobutyric acid (GABA), beta-alanine and taurine is an essential instrument that shapes signalling, proper cell functioning and survival in the brain and peripheral organs. This background motivates the synthesis of novel classes of compounds regulating their selective transport through various fluid-organ barriers via the low-affinity gamma-aminobutyric acid (GABA) transporter subtype 2 (GAT2). Natural and synthetic spirocyclic compounds or therapeutics with a range of structures and biological activity are increasingly recognised in this regard. Based on pre-validated GABA transport activity, straightforward and efficient synthesis method was developed to provide an azaspiro[4.5]decane scaffold, holding a variety of charge, substituent and 3D constrain of spirocyclic amine. Investigation of the azaspiro[4.5]decane scaffold in cell lines expressing the four GABA transporter subtypes led to the discovery of a subclass of a GAT2-selective compounds with acyl-substituted azaspiro[4.5]decane core. (C) 2015 Elsevier Ltd. All rights reserved.
Synthesis of the Tricyclic Core of the Marine Alkaloid Lepadiformine
作者:Roger Hunter、Philip Richards
DOI:10.1055/s-2003-36782
日期:——
A stereoselective synthesis of the tricyclic core in racemic form of the marine alkaloid Lepadiformine is described from 4-methoxy-3-pyrrolin-2-one (methyl tetramate). Key steps involve 5,5-dialkylation of the tetramate, metathesis closure to an A/C 1-azaspirocycle and stereoselective hydrogenation for the trans A/B 1-azadecalin system.