1192686-26-2Relevant academic research and scientific papers
Pyrrolo[1,2-a]pyrazine and pyrazolo[1,5-a]pyrazine: Novel, potent, and selective series of Vasopressin1b receptor antagonists
Arban, Roberto,Bianchi, Federica,Buson, Alberto,Cremonesi, Susanna,Fabio, Romano Di,Gentile, Gabriella,Micheli, Fabrizio,Pasquarello, Alessandra,Pozzan, Alfonso,Tarsi, Luca,Terreni, Silvia,Tonelli, Federica
supporting information; experimental part, p. 5044 - 5049 (2010/10/19)
Novel series of pyrrole-pyrazinone and pyrazole-pyrazinone have been identified as potent and selective Vasopressin1b receptor antagonists. Exploration of the substitution pattern around the core of these templates allowed generation of compounds with high inhibitory potency at the Vasopressin1b receptor, including examples that showed good selectivity with respect to Vasopressin1a, Vasopressin2, and Oxytocin receptor subtypes.
PYRROLO [1, 2-A] PYRAZINE DERIVATIVES AS VASOPRESSIN VIB RECEPTOR ANTAGONISTS
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Page/Page column 61, (2009/12/05)
The present invention relates to novel compounds of formula (I) or salts thereof; wherein R is -X-[CH2]nCR4R5-Y; or a group G; R1 is H or C1 -C4 alkyl; R2 is aryl, heteroaryl or C3-C7 cycloalkyl, which may be substituted with one or more: halogen, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 haloalkyl, C1-C4 haloalkoxy, - CN; R3 is -CH2-C(=O)-NH-R6; X is -CR7R8-, -O-, -NR9-, -S-; Y is-NR10R11 R4 is H or C1 -C4 alkyl; R5 is H or C1 -C4 alkyl; R6 is C1-C6 alkyl, C3-C6 cycloalkyl; C3-C6 cycloalkyl- (C1 -C2 alkyl); which may be substituted by one or more halogen, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 haloalkyl, C1-C4 haloalkoxy; R7 is H or C1 -C4 alkyl; R8 is H or C1 -C4 alkyl; R9 is H or C1 -C4 alkyl; R10 is H or C1-C4 alkyl, or together with R11 forms a 4-8 saturated or unsaturated heterocycle ring which may comprise a further heteroatom selected from O, S and -NR12; such heterocycle may be substituted by one or more halogen, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 haloalkyl, C1-C4 haloalkoxy; R11 is H or C1 -C4 alkyl; R12 is H, C1-C6 alkyl, C3-C7 cycloalkyl; C3-C6 cycloalkyl- (C1 -C2 alkyl); which may be substituted by one or more halogen, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 haloalkyl, C1-C4 haloalkoxy; G is one of the groups selected from the list consisting of G1, G2, G3, G4, G5, G6, G7, G8, G9, G10, G11 and G12; R 13 is H or C1-C4 alkyl, or together with R14 forms a 4-8 saturated or unsaturated heterocycle ring which may comprise a further heteroatom selected from O, S and -NR24; such heterocycle may be substituted by one or more halogen, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 haloalkyl, C1-C4 haloalkoxy; R14 R16 is H, C1-C6 alkyl, C3-C7 cycloalkyl; C3-C6 cycloalkyl- (C1 -C2 alkyl); which may be substituted by one or more halogen, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 haloalkyl, C1-C4 haloalkoxy; R15, R 17 correspond to H or C1-C4 alkyl and may assume different meanings; R 18 is H or C1-C4 alkyl, or together with R17 forms a 4-8 saturated or unsaturated heterocycle ring which may comprise a further heteroatom selected from O, S and -NR25; such heterocycle may be substituted by one or more halogen, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 haloalkyl, C1-C4 haloalkoxy; R19, R20, R21, R22, R23, R24, R25 is H, C1-C6 alkyl, C3-C7 cycloalkyl; C3-C6 cycloalkyl- (C1 -C2 alkyl); which may be substituted by one or more halogen, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 haloalkyl, C1-C4 haloalkoxy; R26, R27, R28, R29 is H, C1-C6 alkyl, C3-C7 cycloalkyl; C3-C6 cycloalkyl- (C1 -C2 alkyl); which may be substituted by one or more halogen, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 haloalkyl, C1-C4 haloalkoxy; I, I' correspond to 1 or 2 and may assume different meanings; m, m', m", m"', mιv, mv correspond to 0, 1 or 2 and may assume different meanings; n is 1, 2 or 3; q is 1, 2 or 3; p, p', p", p'" correspond to 0, 1, 2 or 3 and may assume different meanings; processes for their preparation, intermediates used in these processes, pharmaceutical compositions containing them and their use in therapy, as antagonists of V1b receptors, e.g. to treat depression and anxiety.
