تفاعل #10073

معادلة التفاعل

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

furan-2-carbaldehyde

Sodium borohydride

→

product

المردود 35.4%

2-(2,6-Dioxo(3-piperidyl))-4-[(2-furylmethyl)amino]isoindoline-1,3-dione

المردود 35.4%

المذيبات

acetic acid

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةThe mixture was heated
2. 2
   درجة الحرارةto reflux for 5 hours
3. 3
   أخرىThe solvent was evaporated in vacuo
4. 4
   workup.DISSOLUTIONthe residue was dissolved in ethyl acetate (100 ml)
5. 5
   غسيلwashed with H2O (3×100 ml), saturated aqueous NaHCO3 (2×100 ml), brine (1×100 ml)
6. 6
   أخرىdried
7. 7
   أخرىThe solvent was evaporated
8. 8
   أخرىthe residue was purified by chromatography (ethyl acetate/hexane, 1:1)

الإجراء التجريبي

To a suspension of 4-amino-2-(2,6-dioxo(3-piperidyl))isoindoline-1,3-dione (0.55 g, 2 mmol) in acetic acid (20 ml) was added furan-2-carbaldehyde (0.20 g, 2.05 mmol). The mixture was heated to reflux for 5 hours and allowed to cool at room temperature. Sodium borohydride (80 mg, 2 mmol) was added to the reaction mixture. The reaction mixture was stirred for 24 hours. The solvent was evaporated in vacuo and the residue was dissolved in ethyl acetate (100 ml), washed with H2O (3×100 ml), saturated aqueous NaHCO3 (2×100 ml), brine (1×100 ml), and dried. The solvent was evaporated and the residue was purified by chromatography (ethyl acetate/hexane, 1:1) to give 0.25 g (35%) of product as a yellow solid: mp 171–173° C.; 1H NMR (DMSO-d6) δ 11.10 (s, 1H), 7.58 (t, J=7.1 Hz, 2H), 7.18 (d, J=8.6 Hz, 1H), 7.08–6.97 (m, 2H), 6.39–6.36 (m, 2H), 5.06 (dd, J=5.2 and 12.4 Hz, 1H), 4.57 (d, J=6.0 Hz, 2H), 2.96–2.82 (m, 1H), 2.63–2.46 (m, 2H), 2.06–2.02 (m, 1H; 13C NMR (DMSO-d6) δ 172.76, 170.01, 168.75, 167.21, 151.97, 145.81, 142.42, 136.05, 132.09, 117.60, 111.04, 110.42, 109.73, 107.38, 48.57,30.95,22.10; Anal. Calcd. For C18H15N3O5: C, 61.19; H, 4.28; N, 11.89. Found: C, 61.02; H, 4.24; N, 11.81.

المصدر