Dimethyl Sulfate → HCID 11966594, compound

Participants

Reaction Steps

To a 250 mL round bottom flask was added N-Boc-4-chloro-L-phenylalanine (0.971 g, 3.24 mmol), potassium carbonate (0.448 g, 3.24 mmol), a stir bar and 30 ml of acetone. To this was added dimethyl sulfate (0.613 ml, 6.48 mmol) and the reaction was allowed to proceed at ambient temperature for 36 h. The reaction was quenched with water (15 ml), and the product was extracted with ethyl acetate (4×100 ml). The organics were pooled, washed with brine, and dried over sodium sulfate. The organics were filtered and concentrated in vacuo to provide a pale yellow residue. The residue was purified by column chromatography on a Biotage SP1, 40M Biotage silica cartridge, eluting with a linear gradient of hexanes-ethyl acetate to provide the title compound as a pale yellow foam (950 mg). Mass spectrum (ESI) 214.1 (M-Boc). 1H NMR (600 MHz, CDCl3): δ 7.24 (d, J=8.3 Hz, 2H), 7.06 (d, J=8.1 Hz, 1H), 4.96 (d, J=7 Hz, 1H), 4.56 (d, J=6 Hz, 1H), 3.71 (s, 3H), 3.08 (dd, J=5.7, 5.7 Hz, 2H), 3.01 (dd, J=5.9, 6.0 Hz, 1H), 1.42 (s, 9H).

Provenance & Evidence