2-Phenyl-5-(trifluoromethyl)-oxazole-4-carboxylic acid → (1r,2r)-2-{4'-[(2-Phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-biphenyl-4-carbonyl}-cyclohexanecarboxylic acid

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Reaction Steps

With a method similar to that used for the preparation of racemic trans-2-{4′-[(2-phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-biphenyl-4-carbonyl}-cyclopentanecarboxylic acid above, racemic 2-{4′-[(2-phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-biphenyl-4-carbonyl}-cyclohexanecarboxylic acid was prepared from 2-phenyl-5-trifluoromethyl-oxazole-4-carboxylic acid and racemic trans-2-(4′-amino-biphenyl-4-carbonyl)-cyclohexanecarboxylic acid. The racemic product obtained was separated by chiral SFC to afford (1R,2R)-2-{4′-[(2-phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-biphenyl-4-carbonyl}-cyclohexanecarboxylic acid (or enantiomer). [α]D: +25.4° in DMSO. LCMS calcd for C31H25F3N2O5 (m/e) 562, obsd 563 (M+H).

Provenance & Evidence