反应详情

A solution of ethyl 2-cyano-3,3-dimethyl-4-(3-methoxyphenyl)butanoate (9.0 g, 0.033 mol) and KOH (9.2 g, 0.163 mol) in ethylene gylcol (100 mL) was heated at 180° C. for 2 days. The solution was cooled to room temperature, poured into water (200 mL) and extracted with ether (100 mL). The organic layer was separated, dried (MgSO4) and evaporated to afford the acid (6.7 g, 0.03 mol)as brown oil, which was used without further purification. 1H NMR (360 MHz, CDCl3) δ 1.06 (6H, s), 2.24 (2H, s), 2.66 (2H, s), 3.81 (3H, s), 6.74-6.79 (3H, m), 7.19 (1H, t, J=8.1 Hz). MS (ES+) 223 (M+1).

1. extractionextracted with ether (100 mL)
2. customThe organic layer was separated
3. dry with materialdried (MgSO4)
4. customevaporated