HCID 19822239, compound → HCID 19822172, compound

Participants

Reaction Steps

2.1 g of 6-acetoxy-7-t-butyl-2-methyl-2-(4-nitrophenoxymethyl)-2H-chromene (prepared as described in Preparation 57) were dissolved in a mixture of 20 ml of benzene and 2 ml of acetic acid, and the compound was reduced for 10 hours at room temperature, in the presence of 0.1 g of 10% w/w palladium-on-carbon, and under about 1 atmosphere (about 1 bar) pressure of hydrogen. The catalyst was filtered off, and the reaction mixture was washed with a saturated aqueous solution of sodium bicarbonate and then with water, after which it was dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure, and the resulting residue was purified by silica gel column chromatography, eluted with benzene, to give the title compound as a slightly brown oil.

Provenance & Evidence