1247823-01-3Relevant academic research and scientific papers
Exploring the neuroleptic substituent in octoclothepin: Potential ligands for positron emission tomography with subnanomolar affinity for α1-adrenoceptors
Kristensen, Jesper L.,Püschl, Ask,Jensen, Martin,Risgaard, Rune,Christoffersen, Claus T.,Bang-Andersen, Benny,Balle, Thomas
experimental part, p. 7021 - 7034 (2010/11/18)
A series of 1-(10,11-dihydrodibenzo[b,f]thiepin-10-yl)-4-methylpiperazine analogues substituted in the 8-position of the 10,11-dihydrodibenzo[b,f]thiepine scaffold with aryl, heteroaryl, amine, and amide substituents are described. The compounds were designed using the previously reported Liljefors- B?ges? pharmacophore model for dopamine D2 and α1-adrenoceptor antagonists, with the aim of obtaining selective α1-adrenoceptor antagonists suitable for development as radioligands for imaging of central α1-adrenoceptors by positron emission tomography. Sixteen aryl and heteroaryl substituted octoclothepin analogues were prepared by a convergent synthesis via coupling of 1-methyl-4-(8-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-10, 11-dihydrodibenzo[b,f]thiepin-10-yl)piperazine with aryl and heteroaryl halides under palladium catalysis. The most selective compound obtained, (S)-N-((11-(4-methylpiperazin-1-yl)-10,11-dihydrodibenzo[b,f]thiepin-2-yl) methyl)isobutyramide (S)-35, showed a similar subnanomolar affinity compared to α1a, α1b, and α1d- adrenoceptors and a selectivity ratio of 20, 440, and 20 with respect to D 2, 5-HT2C, and H1 receptors, respectively.
