Di-tert-butyl azodicarboxylate → 4-{2-[2-(4-Chloro-phenyl)-5,6-difluoro-benzoimidazol-1-yl]-2-cyclohexyl-ethoxy}-3,5-difluoro-benzoic acid methyl ester

Participants

Reaction Steps

The title compound was prepared in analogy to Example 4, intermediate, from 2-[2-(4-chloro-phenyl)-5,6-difluoro-benzoimidazol-1-yl]-2-cyclohexyl-ethanol (Ex. 1, int. c), 3,5-difluoro-4-hydroxy-benzoic acid methyl ester (commercially available) and di-tert-butyl azodicarboxylate. The compound was purified by silica gel chromatography using a MPLC system (CombiFlash Companion, Isco Inc.) eluting with a gradient of n-heptane:ethyl acetate (100:0 to 70:30) to give the desired compound as a light yellow foam (59%). MS (Turbo Spray): m/z=561.2 [M+H].

Provenance & Evidence