Formic Acid → Azithromycin

HRID 24271

Reaktionsgleichung

Reaktionsgleichung von HRID 24271
[CH3:1][CH2:2][C@H:3]1[O:18][C:16](=[O:17])[C@H:15]([CH3:19])[C@@H:14]([O:20][C@@H:21]2[O:26][C@@H:25]([CH3:27])[C@H:24]([OH:28])[C@@:23]([O:30][CH3:31])([CH3:29])[CH2:22]2)[C@H:13]([CH3:32])[C@@H:12]([O:33][C@@H:34]2[O:39][C@H:38]([CH3:40])[CH2:37][C@H:36]([N:41]([CH3:43])[CH3:42])[C@H:35]2[OH:44])[C@@:11]([OH:46])([CH3:45])[CH2:10][C@@H:9]([CH3:47])[CH2:8][NH:7][C@H:6]([CH3:48])[C@@H:5]([OH:49])[C@@:4]1([OH:51])[CH3:50].[CH:52](O)=O.C=O.[OH-].[Na+]>C(#N)C>[CH3:1][CH2:2][C@H:3]1[O:18][C:16](=[O:17])[C@H:15]([CH3:19])[C@@H:14]([O:20][C@@H:21]2[O:26][C@@H:25]([CH3:27])[C@H:24]([OH:28])[C@@:23]([O:30][CH3:31])([CH3:29])[CH2:22]2)[C@H:13]([CH3:32])[C@@H:12]([O:33][C@@H:34]2[O:39][C@H:38]([CH3:40])[CH2:37][C@H:36]([N:41]([CH3:43])[CH3:42])[C@H:35]2[OH:44])[C@@:11]([OH:46])([CH3:45])[CH2:10][C@@H:9]([CH3:47])[CH2:8][N:7]([CH3:52])[C@H:6]([CH3:48])[C@@H:5]([OH:49])[C@@:4]1([OH:51])[CH3:50]

Komponenten

6

Edukt 4

HCID 284Formic AcidHCID 712FormaldehydeHCID 14798Sodium HydroxideHCID 98106019-Deoxo-9a-aza-9a-homoerythromycin A

Produkt 1

HCID 447043Azithromycin

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6342AcetonitrileLösungsmittel

Versuchsvorschrift

9-Deoxo-9a-aza-9a-homoerythromycin A (73.5 g —0.1 mole) was dissolved in 250 ml acetonitrile. To this solution, formic acid (19 ml, 0.5 mole) followed by formaldehyde (37%, 20 ml, 0.25 mole) were added and refluxed for 24 hours. The pH of the reaction mixture was adjusted with alkali (NaOH solution) to 10.5 and filtered to remove particles. To the filtered acetonitrile solution, an equal volume of water was added to precipitate Azithromycin monohydrate as cube shaped crystals. The crystals were filtered and dried under vacuum at 50° C. to give 65 g of Azithromycin monohydrate having water content of 5% (water content measured by the Karl Fischer titration method). This sample of Azithromycin monohydrate crystals has a characteristic solid state (KBr pellet) IR spectrum (FIG. 1) and a characteristic X-ray diffraction pattern (FIG. 2).

Aufarbeitung

  1. additionwere added
  2. temperaturerefluxed for 24 hours
  3. filtrationfiltered
  4. customto remove particles
  5. additionTo the filtered acetonitrile solution, an equal volume of water was added
  6. customto precipitate Azithromycin monohydrate as cube
  7. filtrationThe crystals were filtered
  8. customdried under vacuum at 50° C.

Quellen und Nachweise

ORD-Eintrag
ord-388a27038ac94207a913ef159e6017a5
Quelldatensatz
uspto-grants-2005_02
Patentnummer
US06855813B2

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