D-Alpha-aminobutyric acid → (r)-2-{-4-[2-(4'-Tert-butyl-biphenyl-4-ylmethyl)-4-(2,4-dichloro-phenyl)-imidazol-1-yl]-phenylamino}-butyric acid

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Reaction Steps

2-(4′-tert-Butyl-biphenyl-4-ylmethyl)-4-(2,4-dichloro-phenyl)-1-(4-iodo-phenyl)-1H-imidazole (191 mg, 0.3 mmol) was treated as described in general procedure R using D-2-aminobutyric acid (310 mg, 3 mmol) to give (R)-2-{-4-[2-(4′-tert-butyl-biphenyl-4-ylmethyl)-4-(2,4-dichloro-phenyl)-imidazol-1-yl]-phenylamino}-butyric acid, which was then treated as described in general procedure F to give (4R)-5-{-4-[2-(4′-tert-butyl-biphenyl-4-ylmethyl)-4-(2,4-dichloro-phenyl)-imidazol-1-yl]-phenyl}-4-ethyl-1,2,5-thiadiazolidine-3-one-1,1-dioxide.

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