Methanol → HCID 58022626, compound

Participants

Reaction Steps

To a solution of the compound of Example 39 (15.8 g) in benzene (166 mL) was added diphenylphosphoryl azide (7.86 mL) and triethylamine (6.01 mL), and the resultant solution was heated to reflux for 1.5 hours. The temperature of the reaction solution was returned to room temperature, and methanol (20 mL) was added dropwise over 20 minutes. The resultant solution was heated to reflux for 30 minutes, and then further sodium methoxide (3.58 g) was added. The resultant solution was heated to reflux for 1.5 hours. To the reaction solution was added saturated aqueous ammonium chloride, and extracted with ethyl acetate. The organic layer was washed with water and saturatedbrine in that order, and then dried over anhydrous sodium sulfate. The solvent was evaporated, and the resultant residue was purified by silica gel column chromatography (hexane ethyl acetate=5:1) to obtain the target product (15.6 g) as a colorless oil.

Provenance & Evidence