1350816-97-5Relevant articles and documents
Toward the definition of stereochemical requirements for MT 2-selective antagonists and partial agonists by studying 4-phenyl-2-propionamidotetralin derivatives
Bedini, Annalida,Lucarini, Simone,Spadoni, Gilberto,Tarzia, Giorgio,Scaglione, Francesco,Dugnani, Silvana,Pannacci, Marilou,Lucini, Valeria,Carmi, Caterina,Pala, Daniele,Rivara, Silvia,Mor, Marco
experimental part, p. 8362 - 8372 (2012/02/14)
New derivatives of 4-phenyl-2-propionamidotetralin (4-P-PDOT) were prepared and tested on cloned MT1 and MT2 receptors, with the purpose of merging previously reported pharmacophores for nonselective agonists and for MT2-selective antagonists. A 8-methoxy group increases binding affinity of both (±)-cis- and (±)-trans-4-P-PDOT, and it can be bioisosterically replaced by a bromine. Conformational analysis of 8-methoxy-4-P-PDOT by molecular dynamics, supported by NMR data, revealed an energetically favored conformation for the (2S,4S)-cis isomer and a less favorable conformation for the (2R,4S)-trans one, fulfilling the requirements of a pharmacophore model for nonselective melatonin receptor agonists. A new superposition model, including features characteristic of MT2- selective antagonists, suggests that MT1/MT2 agonists and MT2 antagonists can share the same arrangement for their pharmacophoric elements. The model correctly predicted the eutomers of (±)-cis- and (±)-trans-4-P-PDOT. The model was validated by preparing three dihydronaphthalene derivatives, either able or not able to reproduce the putative active conformation of 4-P-PDOT. (Figure presented)
