Dichloromethane → HCID 66593487, compound

Participants

Reaction Steps

An oven-dried 25 mL flask was charged with dry CH2Cl2 (5 mL), 3-t-butylphenol (100 mg, 0.67 mmol), bis(4-nitrophenyl) carbonate (405 mg, 1.34 mmol) and 4-DMAP (162 mg, 1.34 mmol). The reaction was stirred overnight at room temperature and then evaporated. Column chromatography (n-hexane/ethylacetate 8:1) yielded 3-t-butylphenyl 4-nitrophenyl carbonate (189 mg, 0.60 mmol, 90%). This carbonate was dissolved in dry CH2Cl2 (8 mL) and 4-DMAP (162 mg, 1.34 mmol) was added. After 15 min, propargylamine (73 mg, 0.085 ml, 1.34 mmol) was added by syringe. The reaction was allowed to stir overnight at room temperature and then evaporated. Column chromatography (n-hexane/ethylacetate 15:1) yielded N-propargyl-3-t-butylphenyl carbamate (93 mg, 0.40 mmol, 60%). 1H NMR (CDCl3, 400 MHz) δ 1.32 (t, 9H), 2.30 (s, 1H), 4.08 (d, J=5.2 Hz, 2H), 5.27 (broad, 1H), 6.97 (d, J=7.2 Hz, 1H), 7.13 (d, J=2.0 Hz, 1H), 7.23˜7.31 (m, 2H); 13C NMR (CDCl3, 100 MHz) δ 30.9, 31.2, 34.7, 72.0, 79.3, 118.5, 122.5, 128.8, 150.6, 152.9, 154.2.

Provenance & Evidence