4'-(2,6-Difluoro-benzoylamino)-6-methyl-biphenyl-3-carboxylic acid methyl ester → 2-(3-Iodo-4-methylphenyl)-1,3,4-oxadiazole

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Reaction Steps

3-Iodo-4-methyl benzoic acid methyl ester was treated with hydrazine to form 3-Iodo-4-methyl benzoic acid hydrazide. 2-(3-Iodo-4-methyl-phenyl)-[1,3,4]oxadiazole was prepared from 3-iodo-4-methyl benzoic acid hydrazide according to a method analogous to that described in J. of Medicinal Chemistry (2001), 44(8): 1268-85, the entire teachings of which are incorporated herein by reference. Compounds 46, 68, 69, 70, and 71 were prepared via an amide coupling reaction analogous to that described in step A of the synthesis of Compound 1, followed by a Suzuki coupling reaction analogous to that described in step B of the synthesis of Compound 1. The amide coupling reaction and Suzuki coupling reaction are shown for Compound 69 in Scheme XX below:

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