Allyl bromide → 6-Allyloxy-4-ethyl-3-methyl-phthalic Acid Dimethyl Ester

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

4-Ethyl-6-hydroxy-3-methyl-phthalic acid dimethyl ester (1.01 g, 4.02 mmol) was dissolved in DMF (5 mL). Potassium carbonate (3.33 g, 24.14 mmol) was added, followed by allylbromide (2.92 g, 24.14 mmol). The suspension was heated at 60° C. After 14 hrs, the reaction was cooled to room temperature and filtered. The solvents were removed in vacuo and the crude material was purified by silica gel chromatography to provide 0.976 g (83%) of the desired product as a colorless oil. 1H NMR (300 MHz, CDCl3): δ=1.16 (t, J=7.2 Hz, 3H), 2.20 (s, 3H), 2.62 (q, J=7.2 Hz, 2H), 3.83 (s, 3H), 3.84 (s, 3H), 4.57 (m, 2H), 5.26 (dd, J=9.3, 1.5 Hz, 1H), 5.41 (dd, J=13.5, 1.5 Hz, 1H), 5.98 (m, 1H), 6.82 (s, 1H) ppm.

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