Trifluoroacetic acid → HCID 66935317, compound

Participants

Reaction Conditions

Reaction Steps

rac-cis-tert-Butyl 4-(2-{2-[3-fluoro-4-(5-methyl-1,3,4-oxadiazol-2-yl)phenoxy]ethyl}cyclopropyl)piperidine-1-carboxylate from step 1 of this example (40 mg, 0.09 mmol) was dissolved in 0.5 mL dichloromethane. TFA (0.5 mL) was carefully added. The mixture was stirred at room temperature for 20 min, upon which the volatile TFA was removed in vacuo and further dried i. vac. for 2 hours. The residue was redissolved in 1 mL NMP. 2-Chloro-5-methylpyrimidine (23 mg, 0.18 mmol) and DBU (0.135 mL, 0.9 mmol) were sequentially added. The mixture was heated at 90° C. for 1.5 hours before cooled back to room temperature. The reaction was then diluted with 2 mL water and 0.5 mL EtOAc. The aqueous phase was further extracted twice with ethyl acetate. The combined organic layers were washed with water and brine, then concentrated and purified by column chromatography through a 12 gram biotage silica gel cartridge eluting with 20% ethyl acetate/hexanes to give the product as white-solid. LRMS talc: 437.2; obs: 438.7 (M+1). Compounds Reported in Table 2 are Prepared by a General Procedure Analogous to that Described in Example 84 Above.

Provenance & Evidence