Diisopropylethylamine → HCID 57937352, compound

Participants

Reaction Steps

A suspension of 2-tert-butyl-1-(tetrahydro-2H-pyran-4-ylmethyl)-1H-benzimidazole-5-sulfonyl chloride (300 mg, 0.80 mmol) in DCE (5 mL) was slowly added to a solution of ethyl (3R)-piperidine-3-carboxylate (140 mg, 0.88 mmol) and DIPEA (1.4 mL, 8.0 mmol) in DCE (25 mL). The reaction mixture was stirred overnight at ambient temperature and the solvent was concentrated. The product was purified by MPLC on silica gel using 60-90% EtOAc/Heptane to provide the title compound as white solid. Yield: 265 mg (66%); 1H NMR (400 MHz, CDCl3) δ 1.26 (t, J=7.13 Hz, 3 H), 1.33 (td, J=12.55, 4.00 Hz, 1 H), 1.50-1.57 (m, 3 H), 1.59 (s, 9 H), 1.62-1.71 (m, 2 H), 1.72-1.84 (m, 1 H), 1.90-2.02 (m, 1 H), 2.22-2.38 (m, 2 H), 2.44 (t, J=11.03 Hz, 1 H), 2.57-2.69 (m, 1 H), 3.28-3.41 (m, 2 H), 3.70 (d, J=11.33 Hz, 1 H), 3.91 (dd, J=11.43, 3.81 Hz, 1 H), 4.01 (dd, J=11.23, 2.83 Hz, 2 H), 4.13 (q, J=7.16 Hz, 2 H), 4.25 (d, J=7.42 Hz, 2 H), 7.43 (d, J=8.59 Hz, 1 H), 7.64 (dd, J=8.40, 1.76 Hz, 1 H), 8.18 (d, J=1.17 Hz, 1 H); MS (ESI) (M+H)+=492.0.

Provenance & Evidence