Diisopropylethylamine → HCID 89478069, compound

Participants

Reaction Steps

At 0° C. to a solution of Intermediate 22C (30 mg, 0.13 mmol) and N,N-diisopropylethylamine (35 μL, 0.20 mmol) in methanol (0.15 mL) and acetonitrile (1.35 mL) was added (trimethylsilyl)diazomethane (0.10 mL, 2.0 M in diethyl ether, 0.20 mmol). The reaction mixture was stirred at rt for 2 h, concentrated and the residue was purified by ISCO chromatography (ethyl acetate/hexane 0-100%, column, 4 g) to afford Intermediate 22D (20 mg, 63%). 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.25-1.41 (5H, m), 1.50-1.61 (1H, m), 1.76-1.98 (2H, m), 2.44-2.52 (1H, m), 2.79-2.90 (1H, m), 3.95 (1H, dd, J=11.4, 3.6 Hz), 4.23-4.38 (6H, m).

Provenance & Evidence