反应详情

To isoprenyl alcohol (80.0 g, 929 mmol) in CH2Cl2 (500 ml) at 0° C. was added one drop of methanesulfonic acid. To this solution was added 2,3-dihydropyran (100 ml, 1.10 mol) dropwise over 3 h. After the addition was complete triethylamine (5 ml) was added and the resulting mixture was filtered through a thin pad of SiO2 and concentrated to afford 159 g (100%) of 2-(3-methyl-3-butenyloxy)tetrahydropyran as a colorless liquid.

1. additionAfter the addition
2. additionwas added
3. filtrationthe resulting mixture was filtered through a thin pad of SiO2
4. concentrationconcentrated