1,2-Dibromoethane → 2-[3-Cyclopropylmethyl-4-(2-nitro-benzene-sulfonyl)-2-oxo-piperazin-1-yl]-3-naphthalen-2-yl-propionic acid methyl ester

HRID 720166노트

반응식

HRID 720166 반응식
[CH3:1][O:2][C:3](=[O:37])[CH:4]([NH:16][C:17](=[O:36])[CH:18]([NH:23][S:24]([C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][C:28]=1[N+:33]([O-:35])=[O:34])(=[O:26])=[O:25])[CH2:19][CH:20]1[CH2:22][CH2:21]1)[CH2:5][C:6]1[CH:15]=[CH:14][C:13]2[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=2)[CH:7]=1.Br[CH2:39][CH2:40]Br.C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C>[CH3:1][O:2][C:3](=[O:37])[CH:4]([N:16]1[CH2:40][CH2:39][N:23]([S:24]([C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][C:28]=2[N+:33]([O-:35])=[O:34])(=[O:25])=[O:26])[CH:18]([CH2:19][CH:20]2[CH2:21][CH2:22]2)[C:17]1=[O:36])[CH2:5][C:6]1[CH:15]=[CH:14][C:13]2[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=2)[CH:7]=1

참가 물질

5

반응물 3

HCID 78391,2-DibromoethaneHCID 11430Potassium CarbonateHCID 695877582-[3-Cyclopropyl-2-(2-nitro-benzenesulfonylamino)-propionylamino]-3-naphthalen-2-yl-propionic acid methyl ester

생성물 1

HCID 695880642-[3-Cyclopropylmethyl-4-(2-nitro-benzene-sulfonyl)-2-oxo-piperazin-1-yl]-3-naphthalen-2-yl-propionic acid methyl ester수율 98%

시약·촉매·용매 1

HCID 6228Dimethylformamide용매

반응 조건

온도
65 °C

실험 절차

To a solution of 2-[3-cyclopropyl-2-(2-nitro-benzenesulfonylamino)-propionylamino]-3-naphthalen-2-yl-propionic acid methyl ester, 12, (3.46 g, 6.59 mmol) and 1,2-dibromoethane (12.38 g, 65.9 mmol) in DMF (40 mL) is added potassium carbonate (9.10 g, 65.8 mmol). The reaction mixture is stirred for 15 hours at 65° C., cooled and quenched with aqueous NH4Cl solution. The mixture is then extracted several times with EtOAc and the combined extracts dried over Na2SO4 and concentrated in vacuo. The resulting residue is purified over silica gel (hexanes/EtOAc, 1:2) to afford 3.57 g (98% yield) of the desired product. 1H NMR (300 MHz, CD3OD) δ 8.01–8.08 (m, 1H), 7.58–7.84 (m, 7H), 7.43–7.52 (m, 2H), 7.35 (dd, J=8.4 Hz, 1H), 5.38 (dd, J=11.7, 4.8 Hz, 1H), 4.33–4.44 (m, 1H), 3.76–3.88 (m, 1H), 3.69 (s, 3H), 3.21–3.66 (m, 4H), 2.99–3.14 (m, 1H), 1.40–1.53 (m, 1H), 1.02–1.16 (m, 1H), −0.14–−0.02 (m, 3H), −0.34–−0.20 (m, 2H); MS (ESMS) m/z 552.2 (M+H)+.

후처리

  1. temperaturecooled
  2. customquenched with aqueous NH4Cl solution
  3. extractionThe mixture is then extracted several times with EtOAc
  4. dry with materialthe combined extracts dried over Na2SO4
  5. concentrationconcentrated in vacuo
  6. customThe resulting residue is purified over silica gel (hexanes/EtOAc, 1:2)

출처 및 근거

ORD 기록
ord-382ee30e434a403d8ab0419b23c3701e
출처 데이터셋
uspto-grants-2006_11
특허 번호
US07132539B2

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