反応 #1973918

反応方程式

methyl 1-(ethoxymethyl)-1H-indole-4-carboxylate

sodium hydroxide

→

title compound

収率 96.7%

1-(ethoxymethyl)-1H-indole-4-carboxylic acid

収率 96.7%

溶媒

methanol

反応条件

後処理

1. 1
   その他The volatiles are removed in vacuo
2. 2
   抽出extracted with EA (2×700 mL)
3. 3
   洗浄The combined extracts are washed with aqueous saturated sodium chloride (2×250 mL)
4. 4
   乾燥dried over anhydrous Na2SO4
5. 5
   濃縮concentrated

実験手順

To a solution of methyl 1-(ethoxymethyl)-1H-indole-4-carboxylate (135 g, 0.58 mol) in methanol (2 L) is added aqueous sodium hydroxide (68 g, 1.74 mol in 340 mL of H2O). The reaction mixture is stirred at 50° C. for 3 h. The volatiles are removed in vacuo. The residue is acidified with HCl (2 M) until pH=3-4, then extracted with EA (2×700 mL). The combined extracts are washed with aqueous saturated sodium chloride (2×250 mL), dried over anhydrous Na2SO4, and concentrated to yield the title compound (123 g, 96%). MS (m/z): 220 (M+H)+.

出典