Benzimidazole derivatives, their production and use

Details Benzimidazole derivatives, their production and use Benzimidazole derivatives, their production and use

2005-01-18

2005-01-18

Shameem, Golam M M (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C548S253000

Reexamination Certificate

active

06844443

ABSTRACT:
A method for producing a compound represented by the formula:wherein the ring A is a benzene ring which may be substituted in addition to the R′ group; R1is hydrogen or an optionally substituted hydrocarbon residue; X is a direct bond or a spacer having an atomic length or two or less between the phenylene group and the phenyl group; Y is —O—, —S(O)m- or —N(R4)— wherein m is an integer of 0, 1 or 2 and R4is hydrogen or an optionally substituted alkyl group; R′ is carboxyl, an ester thereof, an amide thereof or a group capable of forming an anion or a group convertible thereinto; n is an integer of 1 or 2; or a salt thereof, which comprises deprotecting a compound represented by the formula:wherein R is triphenylmethyl, 2-tetrahydropyranyl, methoxymethyl or ethoxy methyl, the other symbols as defined above; or a salt thereof.

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