Sodium borohydride → (3S,4S)-4-(1-benzyloxycarbonylethyl)-3-(1-(R)-benzyloxycarbonyloxyethyl)-1-di(p-anisyl)methyl-2-azetidinone

HRID 1196220Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1196220
[CH2:1]([O:8][C:9]([C:11]([C@H:13]1[N:16]([CH:17]([CH2:27][C:28]2[CH:33]=[CH:32][C:31]([O:34][CH3:35])=[CH:30][CH:29]=2)[CH2:18][C:19]2[CH:24]=[CH:23][C:22]([O:25][CH3:26])=[CH:21][CH:20]=2)[C:15](=[O:36])[C@@H:14]1[C@H:37]([O:39][C:40]([O:42][CH2:43][C:44]1[CH:49]=[CH:48][CH:47]=[CH:46][CH:45]=1)=[O:41])[CH3:38])=[CH2:12])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[BH4-].[Na+]>CO.C(OCC)(=O)C.[Ni](Cl)Cl>[CH2:1]([O:8][C:9]([CH:11]([C@H:13]1[N:16]([CH:17]([CH2:27][C:28]2[CH:29]=[CH:30][C:31]([O:34][CH3:35])=[CH:32][CH:33]=2)[CH2:18][C:19]2[CH:24]=[CH:23][C:22]([O:25][CH3:26])=[CH:21][CH:20]=2)[C:15](=[O:36])[C@@H:14]1[C@H:37]([O:39][C:40]([O:42][CH2:43][C:44]1[CH:49]=[CH:48][CH:47]=[CH:46][CH:45]=1)=[O:41])[CH3:38])[CH3:12])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

6

Edukt 2

HCID 4311764Sodium borohydrideHCID 67919445(3S,4S)-4-(1-benzyloxycarbonylethenyl)-3-(1-(R)-benzyloxycarbonyloxyethyl)-1-di(p-anisyl)methyl-2-azetidinone

Produkt 1

HCID 67919668(3S,4S)-4-(1-benzyloxycarbonylethyl)-3-(1-(R)-benzyloxycarbonyloxyethyl)-1-di(p-anisyl)methyl-2-azetidinone

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 24385Nickel DichlorideKatalysatorHCID 887MethanolLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

A solution of (3S,4S)-4-(1-benzyloxycarbonylethenyl)-3-(1-(R)-benzyloxycarbonyloxyethyl)-1-di(p-anisyl)methyl-2-azetidinone (63 mg) in methanol (1.5 ml) was treated with sodium borohydride (7.7 mg) in the presence of nickel chloride (1.3 mg) at 0°-5° C. for 15 minutes. After stirring at room temperature for an additional 1 hour, the reaction mixture was diluted with ethyl acetate (30 ml), washed with brine and dried over anhydrous sodium sulfate. Filtration and concentration of the filtrate in vacuo gave an oily residue, which was purified by thin-layer chromatography (SiO2) to yield (3S,4S)-4-(1-benzyloxycarbonylethyl)-3-(1-(R)-benzyloxycarbonyloxyethyl)-1-di(p-anisyl)methyl-2-azetidinone.

Aufarbeitung

  1. washwashed with brine
  2. dry with materialdried over anhydrous sodium sulfate
  3. filtrationFiltration and concentration of the filtrate in vacuo
  4. customgave an oily residue, which
  5. customwas purified by thin-layer chromatography (SiO2)

Quellen und Nachweise

ORD-Eintrag
ord-1a75f19c0c6f442e989b533f5c947bdf
Quelldatensatz
uspto-grants-1992_05
Patentnummer
US05112966

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