Competitive antagonism of insect GABA receptors by iminopyridazine derivatives of GABA
摘要:
A series of 4-(6-imino-3-aryl/heteroarylpyridazin-1-yl) butanoic acids were synthesized and examined for antagonism of GABA receptors from three insect species. When tested against small brown planthopper GABA receptors, the 3,4-methylenedioxyphenyl and the 2-naphthyl analogues showed complete inhibition of GABA-induced fluorescence changes at 100 mu M in assays using a membrane potential probe. Against common cutworm GABA receptors, these analogues displayed approximately 86% and complete inhibition of GABA-induced fluorescence changes at 100 mu M, respectively. The 4-biphenyl and 4-phenoxyphenyl analogues showed moderate inhibition at 10 mu M in these receptors, although the inhibition at 100 mu M was not complete. Against American cockroach GABA receptors, the 4-biphenyl analogue exhibited the greatest inhibition (approximately 92%) of GABA-induced currents, when tested at 500 mu M using a patch-clamp technique. The second most active analogue was the 2-naphthyl analogue with approximately 85% inhibition. The 3-thienyl analogue demonstrated competitive inhibition of cockroach GABA receptors. Homology modeling and ligand docking studies predicted that hydrophobic 3-substituents could interact with an accessory binding site at the orthosteric binding site. (C) 2012 Elsevier Ltd. All rights reserved.
LIGANDS FOR ANTIBODY AND FC-FUSION PROTEIN PURIFICATION BY AFFINITY CHROMOTOGRAPHY IV
申请人:GRAFFINITY PHARMACEUTICALS GMBH
公开号:US20160009760A1
公开(公告)日:2016-01-14
The present invention relates to the use, for affinity purification of an antibody or an fragment of an antibody, of a ligand-substituted matrix comprising a support material and at least one ligand covalently bonded to the support material, the ligand being represented by formula (I)
L-(Sp)
v
-Ar
1
—Am—Ar
2
(I)
wherein L, SP, Ar
1
, AM, Ar
2
and v are defined herein.
[EN] INHIBITORS OF ANOCTAMIN 6 PROTEIN AND USES THEREOF<br/>[FR] INHIBITEURS DE LA PROTÉINE ANOCTAMINE 6 ET LEURS UTILISATIONS
申请人:ILDONG PHARMACEUTICAL CO LTD
公开号:WO2022157686A1
公开(公告)日:2022-07-28
The present invention relates to a new compound that can inhibit an anoctamin 6 protein, a composition comprising the compound, a method for preparing the compound, and a method for using the compound or composition.
New and efficient methods for the synthesis of 7-substituted-4-trifluoromethylpyrimido[1,2-b]pyridazin-2-one derivatives using either two-step Suzuki/heterocyclization, or two-step heterocyclization/substitution sequences are developed. A variety of substituted products are obtained in good to excellent yields from 3-amino-6-chloropyridazine and ethyl 4,4,4-trifluorobut-2-ynoate.
US9745339B2
申请人:——
公开号:US9745339B2
公开(公告)日:2017-08-29
[EN] LIGANDS FOR ANTIBODY AND FC-FUSION PROTEIN PURIFICATION BY AFFINITY CHROMOTOGRAPHY IV<br/>[FR] LIGANDS POUR ANTICORPS ET PURIFICATION DE PROTÉINE DE FUSION À FRAGMENT CONSTANT PAR CHROMATOGRAPHIE D'AFFINITÉ IV
申请人:GRAFFINITY PHARMACEUTICALS GMBH
公开号:WO2013117707A1
公开(公告)日:2013-08-15
The present invention relates to the use, for affinity purification of an antibody or an fragment of an antibody, of a ligand-substituted matrix comprising a support material and at least one ligand covalently bonded to the support material, the ligand being represented by formula (I) L-(Sp)v-Ar1-Am-Ar2 wherein L is the linking point on the support material to which the ligand is attached; Sp is a spacer group; v is 0 or 1; Am is an amide group -NR1-C(O)-, and wherein either NR1 is attached to Ar1 and -C(O)- is attached to Ar2, or -C(O)- is attached to Ar1 and NR1 is attached to Ar2; and R1 is hydrogen or C1 to C4 alkyl, more preferably hydrogen or methyl; and most preferably hydrogen; Ar1 is a 5-, 6- or 7-membered mononuclear aromatic ring or partially saturated aromatic ring connected to Sp or L via a chemical bond and which is optionally furthermore (a) attached to a further 5- or 6-membered mononuclear aromatic ring via a chemical bond; or (b) fused to a mononuclear or binuclear aromatic ring as part of a multinuclear ring system wherein Ar1 is directly connected to Am via a chemical bond present on the said 5-, 6- or 7- membered aromatic ring constituting Ar1, or indirectly via a chemical bond which is either present at the further 5- or 6-membered aromatic ring attached to Ar1, or on the further 5- or 6- membered aromatic ring fused to Ar1; and wherein Ar1 is either not further substituted or attached to at least one substituent selected from C1 to C4 alkyl; C3 and C4 cycloalkyl; C2 to C4 alkenyl;; C2 to C4 alkynyl; a halogen; C1 to C4 haloalkyl;;; hydroxyl-substituted C1 to C4 alkyl; C1 to C4 alkoxy; hydroxyl-substituted C1 to C4 alkoxy; halogen-substituted C1 to C4 alkoxy; C1 to C4 alkylamino; C1 to C4 alkylthio; -NO2; =O; =S; =NH; -OH?; and combinations thereof; Ar2 is a 5- or 6-membered mononuclear aromatic ring which is unsubstituted, or via a chemical bond attached to at least one substituent selected from C1 to C6 alkyl; C3 to C6 cycloalkyl; C2 to C6 alkenyl; C5 and C6 cycloalkenyl; C2 to C6 alkynyl; a halogen; C1 to C6 haloalkyl; hydroxyl-substituted C1 to C6 alkyl; C1 to C6 alkoxy; hydroxyl-substituted C1 to C6 alkoxy; halogen-substituted C1 to C6 alkoxy; C1 to C6 alkylamino; C1 to C6 alkylthio; carbamoyl; methylenedioxy; ethylenedioxy; -OH; SH; a 5- or 6-membered mononuclear aromatic ring; and combinations thereof; and wherein Ar2 optionally, further to the substituents to which it may be attached via a chemical bond as cited above, is fused to a 5- or 6-membered mononuclear aromatic ring as part of a multinuclear ring system.