Structure−Activity Relationship Studies on the 5-HT<sub>1A</sub> Receptor Affinity of 1-Phenyl-4-[ω-(α- or β-tetralinyl)alkyl]piperazines. 4
作者:Roberto Perrone、Francesco Berardi、Nicola A. Colabufo、Marcello Leopoldo、Vincenzo Tortorella、Maria Gioia Fornaretto、Carla Caccia、Robert A. McArthur
DOI:10.1021/jm9604538
日期:1996.1.1
The synthesis of 1-phenylpiperazines, linked in the alpha or beta position of the tetralin moiety on the terminal part of the N-4 alkyl chain, and their radioligand binding affinities for 5-HT1A, 5-HT2A, D-1, D-2, alpha(1), and alpha(2) receptors along with SAR studies on the 5-HT1A receptor are reported. Several changes have been carried out on previous structures of type 2, by inserting the alkyl chain with variable length in the alpha or beta position of the tetralin moiety and by changing the position of the methoxy group on the aromatic ring of the tetralin nucleus. The highest affinity (IC50 = 0.50 nM) and selectivity for the 5-HT1A receptor were showed by 1-phenylpiperazine 2a with a three-membered alkyl chain bearing a 5-methoxytetralin-1-yl ring in the omega position.
Catalytic Enantioselective Bromoaminocyclization and Bromocycloetherification
We apply a chiral anionic phase‐transfer system for the catalytic asymmetric bromoaminocyclization and bromocycloetherification of momo‐functional benzo‐cyclic alkenes. Various brominated tricyclic benzo‐heterocycles were produced with up to 99% yields and 99% enantiomeric excess. The resulting enantioenriched hexahydro‐benzoindoles are key building blocks of bioactive molecules.