Hydrochloric Acid → 3-Ethoxy-2,2-dimethyl-3-oxopropanoic acid

関与物質

反応手順

Diethyl dimethylpropanedioate (10 g, 53 mmol) in 170 mL EtOH was treated with 3.00 g (53 mmol) KOH at ambient temperature for 4 days. The reaction mixture was concentrated to dryness and partitioned between EtOAc and water. The aqueous phase was isolated, combined with fresh EtOAc and the pH adj to 2 with 6N HCl. The organic phase was isolated and the aqueous portion extracted twice with EtOAc. The organic phases were combined, dried over MgSO4, filtered and concentrated to give 6.56 g (41 mmol) 3-(ethyloxy)-2,2-dimethyl-3-oxopropanoic acid as a clear oil. 1H NMR (300 MHz, CDCl3) d 4.20 (q, J=7.1 Hz, 2H), 1.46 (s, 6H), 1.26 (t, J=7.1 Hz, 3H).

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