Salicylic Acid → HCID 67120996, compound

Participants

Reaction Steps

To a stirred suspension of SeO2 (0.54 g, 4.82 mmol, 2 equiv) and salicylic acid (0.34 g, 2.41 mmol, 1 equiv) in CH2Cl2 (20 mL) at 0° C. was added a 3.0 M solution of t-butyl hydrogen peroxide (TBHP) in toluene (5.0 mL, 14.46 mmol, 6 equiv). The mixture was stirred at that temperature for 1.5 h, and a solution of the compound (J) (1.00 g, 2.41 mmol, 1 equiv) in CH.sub.2Cl.sub.2 (5 mL) was slowly added for 10 min. The reaction mixture was stirred at 0° C. for 3 h, diluted with CH2Cl2 (30 mL), washed with 10% NaOH solution (10 mL×3) and then saturated Na2S2O3 solution (10 mL×3), dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The crude product was purified by silica gel column chromatography to give the diol compound (K) (0.47 g, 1.06 mmol) in 44% yield, together with the hydroxyl-aldehyde (0.13 g, 0.29 mmol, 12% yield), which was derived from further oxidation. Both of these two compounds can provide the dialdehyde of the Chemical Formula 3 after the Swern oxidation reaction.

Provenance & Evidence