C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/466.05, 260/
C07C 257/06 (2006.01) C07D 235/04 (2006.01) C07D 235/12 (2006.01) C07D 235/28 (2006.01)
Patent
CA 1318676
S P E C I F I C A T I O N Title of the invention : Benzimidazole derivatives and process for their preparations Abstract of the invention : Benzimidazole derivatives of the following formula, Image wherein R1 indicates hydrogen atom, lower alkyl group having carbon atoms of 1 to 6 or dimethylaminopropyl group, R2 indicates hydrogen atom or lower alkanoyl group having carbon atoms of 1 to 3, R3 indicates hydrogen atom, lower alkyl group having carbon atoms of 1 to 3 or lower alkanoyl group having carbon atoms of 1 to 3, X indicates sulfur atom, sulfinyl group, sulfonyl group, amino group or methylene group, A indicates alkylene group having carbon atoms of 1 to 12, which alkylene group may optionally be substituted by hydroxy group or lower alkyl group having carbon atoms of 1 to 3, -(CHR')n-CR"=CR"-(CHR')m-, -(CHR')n Image (CHR')m- (in which R' and R" are each independently hydrogen atom, lower alkyl group having carbon atoms of 1 to 3 or hydroxy group, and n and m are equal to 0, 1, 2 or 3), and Y indicates oxygen atom or sulfur atom; their acid or alkali salts and hydrate thereof are useful as antiallergic agents.
564164
Awano Katsuya
Masuzawa Kuniyoshi
Nishino Keigo
Ohashi Mitsuo
Okamura Kyuya
Borden Ladner Gervais Llp
Kyorin Pharmaceutical Co. Ltd.
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