3,4-dihydro-2H-pyran → HCID 22026141, compound

Participants

Reaction Steps

2,5-Dihydroxy-3,4-dimethyl-benzaldehyde (2.0 g) was dissolved in dichloromethane (50 mL) and 3,4-dihydro-2H-pyran (1.5 g) was added followed by addition of p-toluenesulfonic acid monohydrate (200 mg). The solution was stirred at room temperature for 1 hour and quenched by adding sodium bicarbonate solution (1 mL). Then the dichloromethane solution was dried over MgSO4 and concentrated. The residue was purified by silica gel column eluting with hexane and ethyl acetate (8:2) to give 1.5 g of 2-hydroxy-3,4-dimethyl-5-(tetrahydro-pyran-2-yloxy)-benzaldehyde product.

Provenance & Evidence