Triphenylphosphine → (S)-methyl 1-(pent-4-en-2-yloxy)-2-naphthoate

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Reaktionsschritte

A mixture of methyl 1-hydroxy-2-naphthoate (500 mg, 2.473 mmol), (R)-pent-4-en-2-ol (0.382 mL, 3.71 mmol), triphenylphosphine (1297 mg, 4.95 mmol) and (Z)-diethyl diazene-1,2-dicarboxylate (0.836 mL, 4.95 mmol) in THF (20 mL) was stirred at rt for 3 h. It was then concentrated and the residue was purified by biotage, eluting with 10% EtOAc/hexane to isolate (S)-methyl 1-(pent-4-en-2-yloxy)-2-naphthoate (500 mg, 74.8%) as an oil. 1H NMR (400 MHz, CDCl3) δ 8.41-8.27 (m, 1H), 7.96-7.81 (m, 2H), 7.69-7.45 (m, 3H), 5.89 (ddt, J=17.2, 10.1, 7.1 Hz, 1H), 5.22-5.04 (m, 2H), 4.49-4.29 (m, 1H), 3.99 (s, 3H), 2.66-2.57 (m, 1H), 2.55-2.46 (m, 1H), 1.28 (d, J=6.4 Hz, 3H).

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