2,4-Disubstituted pyrroles: synthesis, traceless linking and pharmacological investigations leading to the dopamine D4 receptor partial agonist FAUC 356
摘要:
Solution-phase synthesis and a solid-phase supported approach to piperazinylmethyl substituted pyrroles are described. Receptor binding studies and the measurement of D4 ligand efficacy led to the ethynylpyrrole 1d (FAUC 356) exerting selective D4 binding and substantial ligand efficacy (66%, EC50 = 1.9 nM). This activity profile might be of interest for the treatment of ADHD. (C) 2002 Elsevier Science Ltd. All rights reserved.
Diethoxymethyl Protected Pyrroles: Synthesis and Regioselective Transformations
作者:Markus Bergauer、Peter Gmeiner
DOI:10.1055/s-2001-18445
日期:——
Treatment of the acceptor-substituted pyrroles 1a-k with neat triethyl orthoformate gives access to the diethoxymethyl (DEM) protected derivatives 2a-k in high yield. Convenient and mild cleavage was achieved by subsequent treatment of the DEM-pyrroles 2a-k with trifluoroacetic acid in acetonitrile and aqueous NaOH at room temperature. DEM protection proved suitable for a variety of regioselective transformations involving directed ortho-metalation and iodine-magnesium exchange processes. Furthermore, electrophilic halogenations and Pd-catalyzed coupling reactions were also carried out.
2,4-Disubstituted pyrroles: synthesis, traceless linking and pharmacological investigations leading to the dopamine D4 receptor partial agonist FAUC 356
作者:Markus Bergauer、Harald Hübner、Peter Gmeiner
DOI:10.1016/s0960-894x(02)00316-5
日期:2002.8
Solution-phase synthesis and a solid-phase supported approach to piperazinylmethyl substituted pyrroles are described. Receptor binding studies and the measurement of D4 ligand efficacy led to the ethynylpyrrole 1d (FAUC 356) exerting selective D4 binding and substantial ligand efficacy (66%, EC50 = 1.9 nM). This activity profile might be of interest for the treatment of ADHD. (C) 2002 Elsevier Science Ltd. All rights reserved.