Discovery of Potent, Orally Bioavailable Phthalazinone Bradykinin B1 Receptor Antagonists
摘要:
The bradykinin B1 receptor is rapidly induced upon tissue injury and inflammation, stimulating the production of inflammatory mediators resulting in plasma extravasation, leukocyte trafficking, edema, and pain. We have previously reported on sulfonamide and sulfone-based B1 antagonists containing a privileged bicyclic amine moiety leading to potent series of 2-oxopiperazines. The suboptimal pharmacokinetics and physicochemical properties of the oxopiperazine sulfonamides led us to seek B1 antagonists with improved druglike properties. Using a pharmacophore model containing a bicyclic amine as anchor, we designed a series of amide antagonists with targeted physicochemical properties. This approach led to a novel series of potent phthalazinone B1 antagonists, where we successfully replaced a sulfonamide acceptor with a cyclic carbonyl unit. SAR studies revealed compounds with subnanomolar B1 binding affinity. These compounds demonstrate excellent cross-species PK properties with high oral bioavailability and potent activity in a rabbit biochemical challenge pharmacodynamic study.
The present invention provides compounds of formula (I) and pharmaceutically acceptable salts thereof,
wherein L, X, R
a
, R
b
, R
1
, R
2
and R
3
are as defined in the specification, processes for their preparation, pharmaceutical compositions containing them and their use in therapy.
Regioselective ortho-lithiation of chloro and bromo substituted fluoroarenes
作者:Florence Mongin、Manfred Schlosser
DOI:10.1016/0040-4039(96)01398-6
日期:1996.9
Deprotonation of fluoroarenes carrying chlorine or bromine as additional substitutents occurs always at a fluorine adjacent position if accomplished with potassium tert-butoxide activated butyllithium or lithium 2,2,6,6-tetramethylpiperidide.
Cycloalkyl and heterocycloalkyl compounds as orexin receptor antagonists
申请人:Takeda Pharmaceutical Company Limited
公开号:US09156829B2
公开(公告)日:2015-10-13
The present invention provides compounds of formula (I) and pharmaceutically acceptable salts thereof,
wherein L, X, Ra, Rb, R1, R2 and R3 are as defined in the specification, processes for their preparation, pharmaceutical compositions containing them and their use in therapy.
1,2-substituted cyclopentanes as orexin receptor antagonists
申请人:Takeda Pharmaceutical Company Limited
公开号:US10011588B2
公开(公告)日:2018-07-03
The present invention provides compounds of formula (I) and pharmaceutically acceptable salts thereof, (I) wherein L, X, Ra, Rb, R1, R2 and R3 are as defined in the specification, processes for their preparation, pharmaceutical compositions containing them and their use in therapy.
A dramatic solvent effect during aromatic halogen-metal exchanges. Different products from lithiation of polyfluorobromobenzenes in ether and tetrahydrofuran
作者:Alexander J. Bridges、William C. Patt、Thomas M. Stickney