Discovery of subtype-selective NMDA receptor ligands: 4-Benzyl-1-piperidinylalkynylpyrroles, pyrazoles and imidazoles as NR1a/2B antagonists
摘要:
4-Benzyl-1-[4-(1 (H) under bar-imidazol-4-yl)but-3-ynyl]piperidine (8) has been identified as a potent antagonist of the NR1A/2B subtype of the NMDA receptor. When dosed orally, this compound potentiates the effects of L-DOPA, in the 6-hydroxydopamine-lesioned rat, a model of Parkinson's disease. (C) 1999 Elsevier Science Ltd. All rights reserved.
The alkyne pathway to keramadine from the marine sponge Agelas sp.
作者:Thomas Lindel、Matthias Hochgürtel
DOI:10.1016/s0040-4039(98)00341-4
日期:1998.4
A novel synthesis of the pyrrole-imidazole alkaloid keramadine (1) from the marine spongeAgelassp. is described. Regiocontrol is reached by the Pd-catalyzed alkynylation of 1-benzenesulfonyl-4-iodoimidazole, followed by N-methylation employing trimethyloxonium tetrafluoroborate. Key step is the double hydrogenation of a 5-alkynyl-2-azidoimidazole which simultanously generates the (Z)-double bond