Isopropyl chloroformate → HCID 11533076, compound

Participants

Reaction Steps

To a solution of 4-(2-azepan-1-yl-ethoxy)-3-(4-bromo-2-methyl-2H-pyrazol-3-yl)-phenylamine (0.06 g, 0.1539 mmol) 2.0 mL of DMA was added isopropyl chloroformate (0.021 g, 0.1687 mmol), and the mixture was stirred at ambient temperature overnight. The reaction mixture was diluted to 5.0 mL with DMSO and purified by RP-HPLC. The proper fractions were collected and evaporated to ¼ volume and the aqueous was neutralized with 1N NaOH to a pH 9.0. Next, the product was extracted with ethyl acetate (2×, 30 mL). The pooled organic layer was dried with sodium sulfate, filtered and evaporated to dryness to afford [4-(2-Azepan-1-yl-ethoxy)-3-(4-bromo-2-methyl-2H-pyrazol-3-yl)-phenyl]-carbamic acid isopropyl ester as a colorless solid in 69% yield. LCMS m/z (%)=478 (M+H79Br, 100), 480 (M+H81Br, 98). 1H NMR (400 MHz, DMSO-d6) δ: 8.79 (bs, 1H), 8.69 (bs, 1H), 7.59 (s, 1H), 7.34 (d, J=2.62 Hz, 1H), 7.21-7.31 (m, 1H), 7.14 (d, J=9.04 Hz, 1H), 4.02-4.12 (m, 1H), 3.92-4.12 (m, 2H), 3.67 (s, 3H), 2.69-2.78 (m, 2H), 2.53-2.59 (m, 2H), 1.4-1.58 (bs, 8H), 1.26 (d, J=6.82 Hz, 6H).

Provenance & Evidence