C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/277.35
C07D 403/00 (2006.01) C07D 257/04 (2006.01)
Patent
CA 1139761
ABSTRACT OF THE DISCLOSURE Novel tetrazolylalkoxycarbostyril derivative of the formula (I): Image (I) wherein R1 is a hydrogen atom, a lower alkyl group, a low alkenyl group, a lower alkanoyl group, a benzoyl group or phenylalkyl group; R2 is a hydrogen atom, a lower alkyl group or a group of the formula ; R3 is a lower alkyl group, a cycloalkyl Image group, a cycloalkylalkyl group, a phenyl group or a phenylalkyl group; A is a lower alkylene group; the carbon-carbon bond between 3- and 4-positions in the carbostyril skeleton is either single or double bond; and the substituted position of a group of the formula, Image in the carbostyril skelton is either 4-, 5-, 6-, 7- or 8-position provided that the only one such group of the formula can be substituted in the whole carbostyril skeleton, thus when R2 in 4-position is a group of the formula Image , then 5-, 6-, 7- or 8-position will have no such substituted group; furthermore, the phenyl group in the above-mentioned benzoyl group, phenylalkyl group or phenyl group may have substituted group(s). The above-mentioned novel tetrazolylalkoxy- carbostyril derivatives have pharmacological activities such as platelet aggregation inhibitory action, anti- inflammatory action, antiulcer action, vasodilatory action and phosphodiesterase inhibitory action and are useful as anti-thrombosis agent, cerebral blood flow improving agent, antiinflammatory agent, antiulcer agent, anti-hypertensive agent and anti-athmatic agent.
334272
Nakagawa Kazuyuki
Nishi Takao
Fetherstonhaugh & Co.
Otsuka Pharmaceutical Co. Ltd.
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