Abstract:
:Amido derivatives 10-18 of the corresponding oxyamines were synthesised as melatoninergic ligands by the reaction of hydroxyphtalimide with the halogeno derivatives or the corresponding alcohols using Mitsunobu reaction conditions. The affinity of the compounds for chicken brain melatonin receptors and recombinant human MT(1) and MT(2) receptors was evaluated using 2-[125I]-iodomelatonin as the radioligand. Overall, the introduction of an oxygen atom in the amido chain was not a favourable parameter as the compounds were less potent than the corresponding deoxy derivatives. However, nanomolar compounds were obtained with the arylethyloxy derivatives (13c (R'=nPr), chicken brain, hMT(1), hMT(2), K(i) values: 4.8, 3.86, 2.4 nM, respectively) and the 2,7-dimethoxynaphthalene derivatives (17c (R'=nPr), chicken brain, hMT(1), hMT(2), K(i) values: 0.04, 0.13, 0.1 nM, respectively). The functional activity of these compounds was evaluated by the aggregation of melanophores in Xenopus laevis tadpoles and the potency was related to the affinity of the molecules for melatonin receptors. The compounds were found to be full agonists and compound 17a was 20-fold more potent than melatonin in this bioassay.
journal_name
Bioorg Med Chemjournal_title
Bioorganic & medicinal chemistryauthors
Pégurier C,Morellato L,Chahed E,Andrieux J,Nicolas JP,Boutin JA,Bennejean C,Delagrange P,Langlois M,Mathé-Allainmat Mdoi
10.1016/s0968-0896(02)00328-0subject
Has Abstractpub_date
2003-03-06 00:00:00pages
789-800issue
5eissn
0968-0896issn
1464-3391pii
S0968089602003280journal_volume
11pub_type
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