Patent · US Active

1-phenyl-3-pyrazolylpyridazin-4(1H)-one compound

US8354411B2 · kind B2 · utility

6Cited by

3References

1Claims

0Family size

Assignee

Takeda Pharmaceutical Company Limited · JP

Inventors

Takahiko Taniguchi · Yokohama, JP
Jun Kunitomo · Osaka, JP

Key dates

Filing date	Feb 4, 2010
Grant date	Jan 15, 2013
Priority date	—
Expiry date	Feb 4, 2030

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K9/2059
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.