反応 #79624

反応方程式

methyl 2-chloro-3-aminobenzoate

1,3-cyclohexanedione

→

3-(3-carbomethoxy-2-chloroanilino)cyclohex-2-en-1-one

収率 84.0%

反応条件

後処理

1. 1
   その他The resultant solid was triturated with hot ethyl acetate
2. 2
   その他dried in vacuo

実験手順

A mixture of methyl 2-chloro-3-aminobenzoate (11.11 g, 59.86 mM) and 1,3-cyclohexanedione (9.05 g, 80.8 mM) was heated at 120° C. under a stream of nitrogen for 4 hours. The resultant solid was triturated with hot ethyl acetate, then dried in vacuo to afford 14.05 g (84%) of 3-(3-carbomethoxy-2-chloroanilino)cyclohex-2-en-1-one as a yellow orange solid. 1H NMR (CDCl3) δ7.6 (dt, 1H, J=1 and 8 Hz), 7.3 (t, 1H, J=8 Hz), 6.6 (br s, 1H), 5.62 (s, 1H), 3.95 (s, 3H), 2.6 (t, 2H, J=6 Hz), 2.4 (t, 2H, J=6 Hz), and 2.1 (m, 2H). IR (CHCl3, cm−1) 3050, 2950, 1729, 1536, 1351, 1299, 1290, 1267, and 1135. MS (ES) m/e 278, 280, 282.

出典