2-Methyl-3-butyn-2-ol → 2-Tert-butoxy-2-(1-(4-chlorophenyl)-7-(3-hydroxy-3-methylbut-1-ynyl)-3-methylnaphthalen-2-yl)acetic acid

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Preparation of ethyl 2-tert-butoxy-2-(1-(4-chlorophenyl)-7-(3-hydroxy-3-methylbut-1-ynyl)-3-methylnaphthalen-2-yl)acetate: To a solution of ethyl 2-(7-bromo-1-(4-chlorophenyl)-3-methylnaphthalen-2-yl)-2-tert-butoxyacetate (30 mg, 0.061 mmol) in THF (1 mL) was added 2-methylbut-3-yn-2-ol (15 mg, 0.18 mmol), CuI (1 mg, 0.006 mmol), Pd(PPh3)4 (3 mg, 0.003 mmol), and Et3N (50 μL, 0.36 mmol). The reaction mixture was stirred at 65° C. for 1 h. A saturated solution of NH4Cl was added. The layers were separated, and the organic layer was dried, filtered, and concentrated in vacuo. The crude material was purified by column chromatography (EtOAc/hexanes) to give 22 mg of the titled compound. 1H-NMR: 400 MHz, (CD3OD) δ: 7.73 (d, J=9 Hz, 1H), 7.67 (s, 1H), 7.57 (m, 2H), 7.48 (m, 1H), 7.40 (d, J=9 Hz, 1H), 7.29 (d, J=9 Hz, 1H), 7.24 (s, 1H), 5.15 (s, 1H), 4.16 (m, 2H), 2.57 (s, 3H), 1.51 (s, 6H), 1.20 (t, J=7 Hz, 3H), 0.99 (s, 9H).

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