- Pyridazinone compounds
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The present invention provides a compound which has the effect of PDE inhibition, and which is useful as a medicament for preventing or treating schizophrenia or so on. A compound of formula (I0): wherein R1 represents a substituent, R2 represents a hydrogen atom, or a substituent, R3 represents a hydrogen atom, or a substituent, Ring A represents an aromatic ring which can be substituted, and Ring B represents a 5-membered heteroaromatic ring which can be substituted, or a salt thereof.
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Page/Page column 66
(2010/08/08)
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- Pyridazines with Heteroatom Substituents in Position 3 and 5. 3) 2-Aryl-5-hydroxypyridazin-3(2H)-ones as Potential Herbicides: Synthesis and Some Reactions
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The coupling of dimethyl acetonedicarboxylate 1 with a variety of aryldiazonium salts 2a-i produces the hydrazones 3a-i which can be cyclized in boiling dichlorobenzene to yield the pyridazone esters 4a-i, or in sodium hydroxide solution to give the pyrid
- Schober, Bernt D.,Megyeri, Gabor,Kappe, Thomas
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p. 169 - 176
(2007/10/02)
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