Selective .kappa.-Opioid Agonists: Synthesis and Structure-Activity Relationships of Piperidines Incorporating an Oxo-Containing Acyl Group
摘要:
This study describes the synthesis and the structure-activity relationships (SARs) of the (S)-(-)-enantiomers of a novel class of 2-(aminomethyl)piperidine derivatives, using K-opioid binding affinity and antinociceptive potency as the indices of biological activity. Compounds incorporating the 1-tetralon-6-ylacetyl residue (30 and 34-45) demonstrated an in vivo antinociceptive activity greater than predicted on the basis of their kappa-binding affinities. In particular, (2S)-2-[(dimethylamino)methyl]-1-[(5,6,7,8-tetrahydro-5-oxo-2-naphthyl)acetyl]piperidine (34) was found to have a potency similar to spiradoline in animal models of antinociception after subcutaneous administration, with ED(50)s of 0.47 and 0.73 mu mol/kg in the mouse and in the rat abdominal constriction tests, respectively. Further in vivo studies in mice and/or rats revealed that compound 34, compared to other selective K-agonists, has a reduced propensity to cause a number of K-related side effects, including locomotor impairment/sedation and diuresis, at antinociceptive doses. For example, it has an ED(50) Of 26.5 mu mol/kg sc in the rat rotarod model, exhibiting a ratio of locomotor impairment/sedation vs analgesia of 36. Possible reasons for this differential activity and its clinical consequence are discussed.
Orthogonal Catalysis for an Enantioselective Domino Inverse‐Electron Demand Diels−Alder/Substitution Reaction
作者:Sebastian Beeck、Sebastian Ahles、Hermann A. Wegner
DOI:10.1002/chem.202104085
日期:2022.1.24
have been accessedthrough a novel enantioselective domino process. Lewis acid activation and organocatalysis were combined to generate the products from readily available substances. A newchiral amine catalyst ensures high enantiomeric ratios. Both enantiomers of the product can be derived and the configuration on the newly generated stereo centers were unambiguously related to the chirality of the
NOVEL 1-(2H-1-OXO-3,4-DIHYDRONAPHTYL-6)-ACETYL-PIPERIDINES, PROCESS FOR THEIR PREPARATION AND THERAPEUTIC USE
申请人:Dr. Lo. Zambeletti S.p.A.
公开号:EP0594611A1
公开(公告)日:1994-05-04
US5428042A
申请人:——
公开号:US5428042A
公开(公告)日:1995-06-27
[EN] NOVEL 1-(2H-1-OXO-3,4-DIHYDRONAPHTYL-6)-ACETYL-PIPERIDINES, PROCESS FOR THEIR PREPARATION AND THERAPEUTIC USE
申请人:DR. LO. ZAMBELETTI S.P.A.
公开号:WO1991017116A1
公开(公告)日:1991-11-14
(EN) Novel azacyclic derivatives of formula (I), in which R1 and R2 are each linear or branched alkyl, cycloalkyl, cycloalkylalkyl, alkenyl, cycloalkenyl or alkynyl; R3 and R4 are identical, and each is a hydrogen or alkyl; and R5 is hydrogen or alkyl. Process for their preparation and their use in medicine.(FR) Nouveaux dérivés azacycliques de formule (I), dans laquelle: R1 et R2 représentent chacun un alkyle, cycloalkyle, cycloalkylalkyle, alcényle, cycloalcényle ou alcynyle linéaires ou ramifiées; R3 et R4 sont identiques et chacun représente un hydrogène ou alkyle; et R5 est hydrogène ou alkyle. Procédé de préparation et utilisation en médecine.