Phosphorus oxide (P4O10) → 1-(6'-Methyl-2',3',4'-trimethoxybenzoyl)-2-methoxynaphthalene

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반응 단계

A mixture of 5B (2.02 g, 10 mmol), 3,4,5-trimethoxytoluene (1.82 g; 10 mmol), P2O5 (10.0 g) and dichloromethane is stirred at room temperature for 16 hours. Subsequently, the dichloromethane is distilled off and the residue is diluted with ethyl acetate. The organic phase is washed with water and concentrated. The residue is purified by column chromatography (petrol ethers:ethyl acetate, 8:2 v/v) and recrystallized from petrol ether: diisopropylether (1:1 v/v). The solid material is collected by vacuum filtration, washed with cold petrol ether: diisopropylether (1:1 v/v) and dried, yielding white crystals, 0.9 g, (24.6 %) mp 72° C.

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