Heterocyclic compounds and cerebral function improvers...

Details Heterocyclic compounds and cerebral function improvers... Heterocyclic compounds and cerebral function improvers...

2006-11-28

2006-11-28

Desai, Rita (Department: 1625)

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Having -c-, wherein x is chalcogen, bonded directly to...

C546S121000

Reexamination Certificate

active

07141579

ABSTRACT:
Heterocyclic compound represented by the formula Iwhereinrepresentsor the like; R1represents hydrogen atom, C1–C6alkyl or benzyloxy; R2represents methyl or nil; R3represents hydrogen atom, C1–C6alkyl, C2–C6alkenyl, C3–C8cycloalkyl or —CH2R5[wherein R5represents phenyl (which may be substituted with C1–C6alkyl, halogen atom or cyano)] or thienyl; R4represents C1–C6alkyl, C2–C6alkenyl, C3–C8cycloalkyl or —CH2R6[wherein R6represents phenyl (which may be substituted with C1–C6alkyl, halogen atom or cyano), naphtyl or thienyl]; or R3is coupled with R4.

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M. E. Baumann, et al., Helvetica Chimica Acta, vol. 69, No. 2, pp. 396-403, XP-001098393, “Herstellung von Disubstituierten Maleinsäure-Anhydriden mit Hilfe von Reaktiven 2-Oxo-3H-Imidazo [1,2-a]Pyridinium-Verbindungen”, Mar. 19, 1986.

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