Potassium tert-butoxide → HCID 86680443, compound

Participants

Reaction Steps

To a solution of Example 35E (8 g, 0.023 mol) in methanol (25 mL) was added potassium t-butoxide (14.5 g, 0.129 mol), and the reaction mixture was stirred at room temperature for 30 minutes. The reaction mixture was concentrated, the residue was diluted with 5% citric acid in water (100 mL), and the mixture was extracted with ethyl acetate (50 mL×2). The combined organic layers were discarded. The aqueous layer was basified using K2CO3 to pH 8-9 and extracted with ethyl acetate (50 mL×2). The combined organic layers were dried over Na2SO4 and concentrated to give the title compound. 1H NMR (300 MHz, CDCl3) δ ppm 1.48 (s, 9H), 1.56-1.69 (m, 1H), 1.86-1.97 (m, 1H), 2.10-2.35 (m, 3H), 2.35-2.48 (m, 1H), 2.52-2.72 (m, 1H), 2.78-2.97 (m, 2H), 3.03 (dt, 1H, J=17.1, 2.4 Hz), 3.92-4.15 (m, 2H), 4.32 (bs, 1H).

Provenance & Evidence