Ethyl 3-{[(3'-{[(2-aminoanilino)carbothioyl]amino}[1,1'-biphenyl]-3-yl)sulfonyl]amino}-3-phenyl-propanoate → Ethyl 3-{[3'-(1H-benzimidazol-2-ylamino)[1,1'-biphenyl]3-yl]-sulfonylamino}-3-phenyl-propanoate

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43 g (75 mmol) of Ethyl 3-{[(3′-{[(2-aminoanilino)carbothioyl]amino}[1,1′-biphenyl]-3-yl)sulfonyl]amino}-3-phenyl-propanoate 11.1.1 and 16.24 g (75 mmol) of yellow mercury oxide were mixed with 1.51 CHCl3 and refluxed for 6 h. The resulting material was purified via flash chromatography (dichloromethane/acetic acid ethyl ester 3+1). Recrystallization from acetic acid ethyl ester led to 27.8 g (68%).

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