Sodium Hydroxide → Sodium 5-(3,3-dimethylbut-1-ynyl)-3-(4-methyl-N-(4-(4-(pyrrolidine-1-carbonyl)pyridin-2-yloxy)cyclohexyl)cyclohexanecarboxamido)thiophene-2-carboxylate

Participants

Reaction Steps

NaH (50 mg of a 60% oil dispersion, 1.14 mmol) was added in portions to a solution of 5-(3,3-dimethyl-but-1-ynyl)-3-[(4-hydroxy-cyclohexyl)-(4-methyl-cyclohexanecarbonyl)-amino]-thiophene-2-carboxylic acid (128 mg, 0.287 mmol) and (2-chloro-pyridin-4-yl)-pyrrolidin-1-yl-methanone from the previous step (300 mg, 1.42 mmol) in THF (5.0 mL) at 0° C. After 5 min the reaction was warmed to room temperature and then heated at 85° C. overnight. The reaction was cooled, aqueous NaOH (0.5 mL of a 1.0 N solution) was added and the reaction evaporated to dryness to give a solid residue. The solid was suspended in ethyl ether and sonicated for several minutes. The ether layer was removed to give an orange solid that was dried under vacuum and purified by column chromatography on reverse phase C18 silica gel (100% water to 20% acetonitrile/water). Fractions containing product were pooled and lyophilized to give the desired product as a colorless solid (30 mg, 16%). MS (m/z): 618.0 [M−H]−; HPLC retention time: 6.43 min (2-98% acetonitrile:water with 0.05% trifluoroacetic acid).

Provenance & Evidence