Methyl acetoacetate → HCID 54704707, compound

Participants

Reaction Steps

The title compound was prepared as described in General Method 1 using 25 mmol of methyl acetoacetate, 27.5 mmol of NaH 60% dispersion in oil, 26.25 mmol of 1.6M n-butyl lithium in hexane in 50 mL of tetrahydrofuran and 25 mmol of 4-benzoylbutyric acid acid sodium salt in 100 mL of tetrahydrofuran. 4-Benzoylbutyric acid sodium salt was prepared by reacting the acid (25 mmol) with hexane washed NaH (17.5 mmol) in tetrahydrofuran at 0° C. for 25 minutes. The crude product was flash chromatographed using CH2Cl2 /MeOH/CH3CO2H (99/1/0.1-97.5/2.5/0.1) to give a solid which was recrystallized from ethyl acetate (m.p. 134°-137° C.). 1H NMR (DMSO-d6) δ 1.1-1.2 (m, 1 H), 1.4-1.6 (m, 1 H), 1.8-2.0 (m, 2 H), 2.0-2.2 (m, 2 H), 2.9 (ABq, 2 H), 4.85 (s, 1 H), 7.2-7.4 (m, 5 H).

Provenance & Evidence