HCID 18624145, compound → HCID 18624173, compound

Participants

Reaction Steps

The acid from STEP 3 (0.5 g) was suspended in absolute EtOH (3.0 mL), added 4N HCl/dioxane (2.0 mL) and stirred overnight at room temperature, and heated to reflux for 1 h. The solution was concentrated to dryness and the residue was dissolved in EtOAC (15 mL), washed with water, dried and concentrated to dryness. The resulting syrup (0.4 g) was dissolved in EtOH (10 mL), added acetic acid (0.1 mL), Pd/C (10%, 0.25 g), and stirred in an atmosphere of hydrogen gas at 50 psi at room temperature. After 16 h, the catalyst was removed by filtration, and the filtrate was concentrated to dryness under reduced pressure. The resulting colorless syrup was dried in vacuo to give the title compound (0.34 g, 80%): Rf=0.44 (50% EtOAc/Hexane); 1H -NMR (CDCl3) δ7.02 (d, 2H); 6.73 (d, 2H); 4.12 (q, 2H); 2.58 (s, 2H); 2.15 (d, 2H); 1.24 (t, 3H); 0.98 (s, 6H); ES-MS m/z 235(M-H); HRMS calcd C14H21O3 (MH+) 237.1485, found 237.1511.

Provenance & Evidence