EP Patent

EP0352960A2 — Purine compounds, process for their preparation and pharmaceutical compositions

Assigned to Smith Kline and French Laboratories Ltd · Expires 1990-01-31 · 36y expired

What this patent protects

Compounds of the formula (1): and pharmaceutically acceptable salts thereof, wherein R¹ is C₁₋₆alkyl, C₂₋₆alkenyl, C₃₋₅cycloalkylC₁₋₄alkyl, phenylC₁₋₄alkyl or C₁₋₄alkyl substituted by 1 to 6 fluoro groups; R² is hydrogen, hydroxy, C₁₋₄alkyl, phenyl, mercapto, C₁₋₄alkylthi…

USPTO Abstract

Compounds of the formula (1): and pharmaceutically acceptable salts thereof, wherein R¹ is C₁₋₆alkyl, C₂₋₆alkenyl, C₃₋₅cycloalkylC₁₋₄alkyl, phenylC₁₋₄alkyl or C₁₋₄alkyl substituted by 1 to 6 fluoro groups; R² is hydrogen, hydroxy, C₁₋₄alkyl, phenyl, mercapto, C₁₋₄alkylthio, CF₃ or amino; R³ is hydrogen, nitro, amino, C₁₋₄alkanoylamino, C₁₋₄­alkoxy, C₁₋₄alkyl, halo, SO₂NR⁴R⁵, CONR⁴R⁵, cyano or C₁₋₄alkylS(O)n; R⁴ and R⁵ are independently hydrogen or C₁₋₄alkyl; and n is 0, 1 or 2; provided that R³ is not hydrogen when R¹ is C₁₋₆alkyl or C₂₋₆alkenyl and R² is hydrogen or hydroxy. Processes for their preparation, pharmaceutical compositions comprising them and their use as medicaments are described.

Drugs covered by this patent

Patent Metadata

Patent number
EP0352960A2
Jurisdiction
EP
Classification
—
Expires
1990-01-31
Drug substance claim
No
Drug product claim
No
Assignee
Smith Kline and French Laboratories Ltd
Source
FDA Orange Book + USPTO grounding via Google Patents

Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.

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