7569-60-0Relevant articles and documents
Dopamine/serotonin receptor ligands. 121: SAR studies on hexahydro-dibenz[d,g]azecines lead to 4-chloro-7-methyl-5,6,7,8,9,14- hexahydrodibenz[d,g]azecin-3-ol, the first picomolar D5-selective dopamine-receptor antagonist
Mohr, Patrick,Decker, Michael,Enzensperger, Christoph,Lehmann, Jochen
, p. 2110 - 2116 (2007/10/03)
Hydroxylated, methoxylated, and/or chlorinated 7-methyl-5,6,7,8,9,14- hexahydrodibenz[d,g]azecines were generally synthesized out of substituted 2-phenylethylamines and isochromanones by Bischler-Napieralski cyclization of the resulting benzamides to dibenzoquinolizines and the quaternization and cleavage of the central C-N bond under Birch conditions. Chlorination of 2-phenylethylamines was useful for the site direction of cyclization, but chlorine atoms were removed under Birch conditions so that chlorination had to be repeated to get the respective chlorinated dibenz[d,g]azecines. The target compounds were tested for their affinity at the different human-cloned dopamine-receptor subtypes (D1 family, D2 family). Generally, hydroxylation and chlorination of the dibenz-azecines increased affinities significantly. 1-Chloro-2-hydroxyhexahydro-dibenz[d,g]azecine was a subnanomolar antagonist at both subtype families. 4-Chloro-3-hydroxy-7-methyl-5, 6,7,8,9,14-hexahydro-dibenz[d,g]azecine was identified as the most potent and selective dopamine D5 receptor ligand described to date with K i(D1) = 0.83, Ki(D2L) = 4.0, K i(D3) = 24.6, Ki(D4) = 5.2 nM, and Ki(D5) = 57 pM (radioligand binding experiments), respectively.
A mild and efficient method for aromatic chlorination of electron-rich arylalkyl amines
Yu, Guixue,Mason, Helen J.,Wu, Ximao,Endo, Masaki,Douglas, James,Macor, John E.
, p. 3247 - 3249 (2007/10/03)
Sulfuryl chloride was used to chlorinate electron-rich arylalkyl amines in a mild and efficient one-pot transformation with simple product isolation via precipitation. Protection of the amine was not needed.