Water → HCID 58017407, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of (R)-tert-butyl 3-((R)-(2-aminoethoxy)(3-chloro-4-fluorophenyl)methyl)piperidine-1-carboxylate (1 g, 2.6 mmol) and DMAP (79 mg, 0.62 mmol) in dry CH2Cl2 (20 mL), Et3N (657 mg, 6.5 mmol) was added. The resulting mixture was cooled to 0-5° C. under ice-water bath, a solution of methyl chloroformate (1.22 g, 13 mmol, 5 eq) was added dropwise. After addition, the reaction mixture was stirred for 1-2 hr at rt. Water (20 mL) was added to quench the reaction. The aqueous layer was extracted with CH2Cl2 (3×20 mL), the combined organic layers were dried over Na2SO4, filtered and concentrated to give the crude product, which was purified by preparative HPLC to afford (R)-tert-butyl 3-((R)-(3-chloro-4-fluorophenyl)(2-(methoxycarbonylamino)ethoxy)methyl)piperidine-1-carboxylate (50 mg, yield 4.3%). 1H NMR (CDCl3, 400 MHz) δ 7.27 (m, 1H), 7.12 (m, 2H), 4.30 (s, 1H), 3.91 (d, 2H), 3.66 (s, 3H), 3.10-3.40 (m, 5H), 2.90 (m, 1H), 1.75 (s, 1H), 1.55 (d, 1H), 1.46 (s, 9H), 1.33 (m, 2H), 1.04 (m, 1H).

Provenance & Evidence