反応 #10108

反応方程式

(methylthio)acetic acid

oxalyl chloride

DMF

4-amino-2-(2,6-dioxo(3-piperidyl))isoindoline-1,3-dione

→

N-[2-(2,6-dioxo-piperidin-3-yl)-1,3-dioxo-2,3-dihydro-1H-isoindol-4-yl]-2-methylsulfanyl-acetamide

収率 69.2%

溶媒

ether

methanol

THF

反応条件

後処理

1. 1
   温度Then the mixture was heated
2. 2
   温度to reflux for 15 h
3. 3
   その他to give a suspension
4. 4
   ろ過The suspension was filtered
5. 5
   洗浄washed with methanol (10 mL)

実験手順

To a solution of (methylthio)acetic acid (0.77 mL, 8.9 mmol) and oxalyl chloride (0.7 mL, 8.0 mmol) in ether (5 mL) was added DMF (0.02 mL) at room temperature. After 3 h, 4-amino-2-(2,6-dioxo(3-piperidyl))isoindoline-1,3-dione (1.1 g, 4.0 mmol) and THF (40 mL) was added to the mixture. Then the mixture was heated to reflux for 15 h. To the mixture was added methanol (10 mL) to give a suspension. The suspension was filtered and washed with methanol (10 mL) to give N-[2-(2,6-dioxo-piperidin-3-yl)-1,3-dioxo-2,3-dihydro-1H-isoindol-4-yl]-2-methylsulfanyl-acetamide as a white solid (1.0 g, 69% yield): mp, 228–230° C.; 1H NMR (DMSO-d6) δ 2.05–2.10 (m, 1H, CHH), 2.18 (s, 3H, CH3), 2,46–2.65 (m, 2H, CH2), 2.82–2.95 (m, 1H, CHH), 3.53 (s, 2H, CH2), 5.17 (dd, J=5.2, 12.6 Hz, 1H, NCH), 7.63 (d, J=7.2 Hz, 1H, Ar), 7.86 (t, J=7.5 Hz, 1H, Ar), 8.61 (d, J=8.4 Hz, 1H, Ar), 10.39 (s, 1H, NH), 11.16 (s, 1H, NH); 13C NMR (DMSO-d6) δ 15.62, 21.96, 30.93, 37.99, 48.94, 116.69, 118.46, 125.28, 131.44, 136.31, 166.67, 167.88, 168.63, 169.78, 172.75; Anal Calcd for C16H15N3O5S: C, 53.18; H, 4.18; N, 11.63. Found: C, 53.26; H, 4.17; N, 11.52.

出典