反应详情

A mixture of 2.0 g (4.5 mmol) of (E)-methyl-4-[2-(3-bromomethyl-5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-naphthalen-2-yl)vinyl]benzoate and 0.65 g (9.5 mmol) of pyrazole in 15 mL of N-methyl pyrrolidine was heated at 100°. After 2 hours, the reaction mixture was cooled to room temperature, poured into brine and extracted with ethyl acetate. The organic extracts were washed with brine, dried over sodium sulfate and concentrated under reduced pressure. The residue was stirred with hexane and the product was filtered off, washed with hexane and dried to give 1.6 g (83%) of methyl-4-[2-(5,5,8,8-Tetramethyl-3-pyrazol-1-ylmethyl-5,6,7,8-tetrahydro-naphthalen-2-yl)vinyl]benzoate (M+=429).

1. temperaturewas heated at 100°
2. extractionextracted with ethyl acetate
3. washThe organic extracts were washed with brine
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated under reduced pressure
6. filtrationthe product was filtered off
7. washwashed with hexane
8. customdried