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Methanol → Diphenylmethyl 7beta-Amino-3-(2,5-dihydro-2-oxofuran-4-ylmethyloxy)ceph-3-em-4-carboxylate

HRID 467382
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HRID 467382 반응식
[O:1]=[C:2]1[CH:6]=[C:5]([CH2:7][O:8][C:9]2[CH2:10][S:11][C@@H:12]3[C@H:32]([NH:33]C(=O)CC4C=CC=CC=4)[C:31](=[O:43])[N:13]3[C:14]=2[C:15]([O:17][CH:18]([C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)=[O:16])[CH2:4][O:3]1.CN1CCOCC1.P(Cl)(Cl)(Cl)(Cl)Cl.CO>ClCCl.O>[NH2:33][C@@H:32]1[C:31](=[O:43])[N:13]2[C:14]([C:15]([O:17][CH:18]([C:25]3[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=3)[C:19]3[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=3)=[O:16])=[C:9]([O:8][CH2:7][C:5]3[CH2:4][O:3][C:2](=[O:1])[CH:6]=3)[CH2:10][S:11][C@H:12]12
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참가 물질

7

반응물 4

HCID 887MethanolHCID 79724-MethylmorpholineHCID 24819Phosphorus pentachlorideHCID 67908619Diphenylmethyl 3-(2,5-dihydro-2-oxofuran-4-ylmethyl oxy)-7beta-phenylacetamidoceph-3-em-4-carboxylate

생성물 1

HCID 67908486Diphenylmethyl 7beta-Amino-3-(2,5-dihydro-2-oxofuran-4-ylmethyloxy)ceph-3-em-4-carboxylate

시약·촉매·용매 2

HCID 962Water용매
HCID 6344Dichloromethane용매2회

반응 조건

온도
-20 °C

실험 절차

Diphenylmethyl 3-(2,5-dihydro-2-oxofuran-4-ylmethyl oxy)-7β-phenylacetamidoceph-3-em-4-carboxylate (958 mg) was dissolved in dichloromethane (13 ml) whilst under an inert atmosphere. The solution was cooled to -20° C. before treating with N-methylmorpholine (352 μl) followed by a solution of phosphorous pentachloride in dichloromethane (12.5 ml of 40 mg ml-1 solution). After stirring for 30 min. at -20° C. the solution was treated with methanol (3.2 ml) and then allowed to warm to RT. After a further 30 min. water (4.3 ml) was added and the reaction was stirred vigorously for 60 min. Solvent was removed by evaporation in vacuo and the residue dissolved in ethyl acetate/water. The pH of the mixture was adjusted to 6.5 with 1.0M aqueous ammonia. Separation of the organic phase was followed by washing with water and brine before drying over anhydrous magnesium sulphate. Purification was accomplished by chromatography of the crude material on silica gel (Keiselgel) eluting with ethyl acetate. The title compound was finally isolated as a foam (565 mg). υmax (CH2Cl2) 1780, 1755 and 1730cm-1 ; δH(CDCl3) 3.34 (1H, d, J 17.7Hz), 3.54 (1H, d, J 17.7Hz), 4.51-4.58 (2H, m), 4.70 (2H, bs) 4.75 (1H, d, J 4.7Hz), 4.97 (1H, d, J 4.7Hz), 5.93 (1H, s), and 7.26-7.40 (10H, m). [Mass spectrum: FAB +ve ion (3NOBA/Na+) MNa+ 501].

후처리

  1. temperatureto warm to RT
  2. stirringthe reaction was stirred vigorously for 60 min
  3. customSolvent was removed by evaporation in vacuo
  4. dissolutionthe residue dissolved in ethyl acetate/water
  5. customSeparation of the organic phase
  6. washby washing with water and brine
  7. dry with materialbefore drying over anhydrous magnesium sulphate
  8. customPurification
  9. washeluting with ethyl acetate

출처 및 근거

ORD 기록
ord-db98e1379050445c8ec20cda286c1ad9
출처 데이터셋
uspto-grants-1992_10
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US05158946

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