3-Aryl-[1,2,4]triazino[4,3-<i>a</i>]benzimidazol-4(10<i>H</i>)-ones: Tricyclic Heteroaromatic Derivatives as a New Class of Benzodiazepine Receptor Ligands
作者:Giampaolo Primofiore、Federico Da Settimo、Sabrina Taliani、Anna Maria Marini、Concettina La Motta、Ettore Novellino、Giovanni Greco、Marco Gesi、Letizia Trincavelli、Claudia Martini
DOI:10.1021/jm991131h
日期:2000.1.1
A series of 3-substituted [1,2,4]triazino[4,3-c]benzimidazoles V were prepared and tested at the central benzodiazepinereceptor (BzR). These compounds were designed as rigid analogues of the previously described N-benzylindolylglyoxylylamide derivatives IV. The title compounds V showed an affinity which depended directly on the presence of the N(10)-H group and an aromatic ring at position 3. Some
Deoxygenative α-alkylation and α-arylation of 1,2-dicarbonyls
作者:Shengfei Jin、Hang T. Dang、Graham C. Haug、Viet D. Nguyen、Hadi D. Arman、Oleg V. Larionov
DOI:10.1039/d0sc03118f
日期:——
challenging but synthetically indispensable approach to α-branched carbonyl motifs that are widely represented among drugs, natural products, and synthetic intermediates. Here, we describe a simple approach to generation of boron enolates in the absence of strong bases that allows for introduction of both α-alkyl and α-aryl groups in a reaction of readily accessible 1,2-dicarbonyls and organoboranes. Obviation
Beta-thiopropionyl-amino acid derivatives and their use as
申请人:SmithKline Beecham P.L.C.
公开号:US06156774A1
公开(公告)日:2000-12-05
Mercapto amino acid derivatives of formula (I), wherein R is hydrogen, a salt-forming cation of a in vivo hydrolysable ester-forming group; R.sub.1 is selected from (a) and (b) in which A is a monocyclic aryl or heteroaryl ring and B is a monocyclic aryl, alicyclic or heterocyclic ring, C and D are independently --Z.sub.p --(CR.sub.8 CR.sub.9).sub.q -- or --(CR.sub.8 CR.sub.9).sub.q --Z.sub.p -- where p is 0 or 1, q is 0 to 3 provided that p+q in C is not 0, R.sub.8 and R.sub.9 are independently hydrogen or (C.sub.1-6)alkyl or together represent oxo and Z is O, NR.sub.10 or S(O).sub.x where R.sub.10 is hydrogen, (C.sub.1-6)alkyl or aryl(C.sub.1-6)alkyl and x is 0-2, and wherein C and D are linked ortho to one another on each of the rings A and B in formula (b); R.sub.2 is hydrogen, (C.sub.1-6)alkyl or aryl(C.sub.1-6)alkyl; R.sub.3 is hydrogen, (C.sub.1-6)alkyl optionally substituted by up to three halogen atoms, (C.sub.3-7)cycloalkyl, fused aryl(C.sub.3-7)cycloalkyl, (C.sub.3-7)cycloalkyl(C.sub.2-6)alkyl, (C.sub.2-6)alkenyl, (C.sub.2-6)alkynyl, aryl, aryl--(CH.sub.2).sub.m --X--(CH.sub.2).sub.n, heterocyclyl or heterocyclyl--(CH.sub.2).sub.m --X--(CH.sub.2).sub.n, where m is 0 to 3, n is 1 to 3 and X is O or S(O).sub.x where x is 0-2 or a bond; R.sub.4 is hydrogen or an in vivo hydrolysable acyl group; and R.sub.5 and R.sub.6 are independently hydrogen and (C.sub.1-6)alkyl or together represent (CH.sub.2).sub.r, where r is 2 to 5; for use in treatment of bacterial infections in humans or animals by administration in combination with a .beta.-lactam antiobiotic.
2,6-Disubstituted 5-hydroxy-3(2H)-pyridazinone-4-carboxylic acid ethyl esters were synthesized from α-keto esters via an efficient three-step sequence including hydrazone formation, acylation with ethyl malonyl chloride, and subsequent Dieckmann cyclization.
Thiophenyl triazol-3-one derivatives as smooth muscle relaxants
申请人:——
公开号:US20030144333A1
公开(公告)日:2003-07-31
The present invention provides novel [1,2,4]triazole-3-one derivatives having the general formula (I)
1
wherein:
Q is
2
and R
1
, R
2
, R
3
, R
4
, R
5
and R
6
are as defined herein or a nontoxic pharmaceutically acceptable salt or solvate thereof which are smooth muscle relaxants and useful in treating disorders responsive to relaxation of smooth muscle such as asthma, irritable bowel syndrome, male erectile dysfunction and urinary incontinence.