Sodium Iodide → 2,2-dimethylpropanoyloxymethyl (6R,7R)-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-methoxyiminoacetyl]amino]-8-oxo-3-(5-oxooxolan-2-yl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate

HRID 6295

Reaktionsgleichung

Reaktionsgleichung von HRID 6295
[C:1]([O:7][CH2:8]Br)(=[O:6])[C:2]([CH3:5])([CH3:4])[CH3:3].[I-].[Na+].[I-].[NH2:13][C:14]1[S:15][CH:16]=[C:17](/[C:19](=[N:41]/[O:42][CH3:43])/[C:20]([NH:22][C@@H:23]2[C:39](=[O:40])[N:25]3[C:26]([C:36]([O-:38])=[O:37])=[C:27]([CH:30]4[O:34][C:33](=[O:35])[CH2:32][CH2:31]4)[CH2:28][S:29][C@H:24]23)=[O:21])[N:18]=1.[Na+]>CC(C)=O.C1(C)C=CC=CC=1.CN1CCCC1=O.C(OCC)(=O)C>[NH2:13][C:14]1[S:15][CH:16]=[C:17](/[C:19](=[N:41]/[O:42][CH3:43])/[C:20]([NH:22][C@@H:23]2[C:39](=[O:40])[N:25]3[C:26]([C:36]([O:38][CH2:8][O:7][C:1](=[O:6])[C:2]([CH3:5])([CH3:4])[CH3:3])=[O:37])=[C:27]([CH:30]4[O:34][C:33](=[O:35])[CH2:32][CH2:31]4)[CH2:28][S:29][C@H:24]23)=[O:21])[N:18]=1

Komponenten

9

Edukt 4

HCID 5238Sodium IodideHCID 30165Iodide IonHCID 15916453Bromomethyl pivalateHCID 44310944sodium (6R,7R)-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-methoxyiminoacetyl]amino]-8-oxo-3-(5-oxooxolan-2-yl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate

Produkt 1

HCID 1415795472,2-dimethylpropanoyloxymethyl (6R,7R)-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-methoxyiminoacetyl]amino]-8-oxo-3-(5-oxooxolan-2-yl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylateAusbeute 59,1 %

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 180AcetoneLösungsmittelHCID 1140TolueneLösungsmittelHCID 8857Ethyl AcetateLösungsmittelHCID 13387N-methyl-2-pyrrolidoneLösungsmittel

Versuchsvorschrift

Pivaloyloxymethyl bromide (0.10 g, ca. 0.5 mmol) and sodium iodide (0.1 g) in acetone (1 ml) were stirred for 0.25 h, filtered and evaporated in vacuo. The iodide in toluene (0.5 ml) was added to sodium (6R,7R)-7-[2(2-aminothiazol-4-yl)-2-(Z)-methoxyiminoacetamido]-3-[(5RS)-2-oxotetrahydrofuran-5-yl]ceph-3-em-4-carboxylate (0.124 g, 0.25 mmol) in N-methylpyrrolidone (2 ml) and stirred for 0.5 h. The reaction mixture was diluted with ethyl acetate, washed twice with water, and with brine, dried, concentrated and flash chromatographed on silica gel eluting with 80,90,100% ethyl acetate in hexane to give the title compound (86 mg, 59%), νmax (CH2Cl2) 1780, 1753, 1735, 1682, 1532, 1374, 1121, 1046 cm-1 ; δH (250 MHz, CDCl3) (9H, s), 1.9-2.2 (1H, m), 2.4-2.8 (3H, m), 3.34 and 3.64, 3.48 and 3.59 (together 2H, 2ABq, J 18.9, 18.4 Hz), 4.08 (3H, s), 5.10, 5.11 (together 1H, 2d, J 4.9 Hz), 5.35 (2H, bs), 5.5-5.95 (3H, m), 6.00, 6.10 (together 1H, 2dd, J 9, 4.9 Hz), 6.85, 6.87 (together 1H, 2s), 7.52, 7.54 (together 1H, 2d, J 9 Hz); [mass spectrum: +ve ion (3-nitrobenzyl alcohol-sodium acetate) MH+(582) MNa+(604)].

Aufarbeitung

  1. filtrationfiltered
  2. customevaporated in vacuo
  3. washwashed twice with water
  4. dry with materialwith brine, dried
  5. concentrationconcentrated
  6. customflash chromatographed on silica gel eluting with 80,90,100% ethyl acetate in hexane

Quellen und Nachweise

ORD-Eintrag
ord-25dcd8cb6bae4c88a76e6afa5f16ed75
Quelldatensatz
uspto-grants-1993_09
Patentnummer
US05246926

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