Ethanol → HCID 11514561, compound

Participants

Reaction Steps

A suspension of ester 17 (2.00 g, 7.05 mmol), Cs2CO3 (3.45 g, 10.6 mmol), 95% EtOH (40 mL), and water (20 mL) was heated at reflux for 8 h. After cooling to room temperature the solvent was removed in vacuo, the residue was treated with water (50 μL), and the resulting solution was acidified with 2 M HCl. The formed precipitate was isolated by filtration, washed with water (100 mL), and dried in vacuo to give 18 (1.80 g, 95%) as a beige solid. 1H NMR (300 MHz, DMSO-d6): δ=3.81 (s, 3 H, OMe), 3.93 (t, J=5.3 Hz, 2 H, 2′-H2), 4.21 (t, J=5.3 Hz, 2 H, 1′-H2), 6.91 (s, 1 H, 7-H), 6.96 (d, J=2.1 Hz, 1 H, 3-H), 7.15 (s, 1 H, 4-H), 11.44 (sbr, 1 H, NH), 12.57 (sbr, 1 H, CO2H) ppm; 13C NMR (50.3 MHz, DMSO-d6): δ=43.0 (C-2′), 55.6 (OMe), 69.5 (C-1′), 94.9 (C-7), 105.8 (C-4), 107.5 (C-3), 119.8 (C-3a), 126.8 (C-2), 133.0 (C-7a), 143.9 (C-5), 149.5 (C-6), 162.4 (C═O) ppm; MS (70 eV, EI): m/z (%)=269 (100) [M]+, 206 (58) [M-(CH2)2Cl]+; C12H12ClNO4 (269.68): calcd. C, 53.44; H, 4.49; found C, 53.54; H, 4.29.

Provenance & Evidence