Dimethylformamide → HCID 11601560, compound

Participants

Reaction Steps

A 100 mL flask was charged with the previously made 1-(2-Hydroxy-phenyl)-undecane-1,11-diol (5.0 g, 18.9 mmol) and 50 mL of dimethyl formamide. To this was added pyridinium dichromate (32.9 g, 87.5 mmol). (The addition was mildly exothermic.) The reaction mixture was stirred at room temperature overnight. The reaction mixture was poured into 50 mL of ethyl acetate and washed with 200 mL of water, 30 mL of 4% aqueous hydrochloric acid, 30 mL water, and finally with 30 mL of brine. The organic layer was then stirred with 10 g of silica gel for 15 minutes, dried with sodium sulfate, filtered, and solvent removed under reduced pressure. The off-white crude product was recrystallized from ethanol/water. The product (0.5 g, 10%) was isolated as an off-white solid, mp 85-87° C. Combustion analysis: Found: C, 69.01; H, 8.36%; C16H22O4 requires C, 69.54; H, 8.02% 1H NMR (d6-DMSO): δ 12.0, s, 1H(COOH); δ 7.9 dd, 1H (aryl H); δ 7.5, dt, 1H, (aryl H); δ 6.9, complex multiplet, 2H (aryl H's), 3.1, t, 2H (CH2 α to carbonyl); δ 2.2, t, 2H (CH2 α to COOH); δ 1.6, multiplet, 2H(CH2 β to carbonyl), δ 1.5, multiplet, 2H(CH2 β to COOH), δ 1.3, multiplet, 8H (rest of CH2's).

Provenance & Evidence