C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/248.6
C07D 495/22 (2006.01)
Patent
CA 1227485
ABSTRACT OF THE DISCLOSURE Fused tetracyclic compounds containing two thiophene rings,one pyridine ring and a triazine ring and which are useful as antiallergic agents are described herein. The compounds are prepared by the reaction of an appropriate substituted aminocarboxamine with sodium nitrite in an acid such as acetic acid.
492240
Merrell Dow Pharmaceuticals Inc.
Osler Hoskin & Harcourt Llp
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