반응 #91695

반응 방정식

3-(5-bromo-1-oxo-1,3-dihydro-isoindol-2-yl)-3-methyl-piperidine-2,6-dione

N,N-dimethylformamide

→

2-(3-methyl-2,6-dioxo-piperidin-3-yl)-1-oxo-2,3-dihydro-1H-isoindole-5-carbonitrile

수율 99.0%

반응 조건

후처리

1. 1
   기타the solvent was removed in vacuo
2. 2
   기타the residue was triturated in water (30 mL)
3. 3
   기타The product was isolated by filtration
4. 4
   세척washed with ethyl acetate hexanes (1:1)
5. 5
   기타dried in vacuo

실험 절차

A stirred mixture of 3-(5-bromo-1-oxo-1,3-dihydro-isoindol-2-yl)-3-methyl-piperidine-2,6-dione (1.40 g, 4.00 mmol), Zn(CN)2 (0.28 g, 2.40 mmol), Pd2(dba)3 (0.07 g, 0.08 mmol) and dppf (0.09 g, 0.16 mmol) in deoxygenated N,N-dimethylformamide (30 mL) was heated to 130° C. under nitrogen. After 2 h, the solvent was removed in vacuo and the residue was triturated in water (30 mL) then ethyl acetate hexanes (1:1, 30 mL). The product was isolated by filtration, washed with ethyl acetate hexanes (1:1) and dried in vacuo providing 2-(3-methyl-2,6-dioxo-piperidin-3-yl)-1-oxo-2,3-dihydro-1H-isoindole-5-carbonitrile (1.2 g, 99% yield); 1H NMR (DMSO-d6) δ 1.67 (s, 3H), 1.89-1.95 (m, 1H), 2.55-2.81 (m, 3H), 4.73 (d, J=18.2 Hz, 1H), 7.82 (d, J=7.8 Hz, 1H), 7.97 (d, J=7.8 Hz, 1H), 8.17 (s, 1H), 10.93 (s, 1H).

출처