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Dimethylformamide → Pirodavir

HRID 981645
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 981645
Cl[C:2]1[N:3]=[N:4][C:5]([CH3:8])=[CH:6][CH:7]=1.C(O)(=O)CCC(O)=O.[NH:17]1[CH2:22][CH2:21][CH:20]([CH2:23][CH2:24][O:25][C:26]2[CH:36]=[CH:35][C:29]([C:30]([O:32][CH2:33][CH3:34])=[O:31])=[CH:28][CH:27]=2)[CH2:19][CH2:18]1.C(=O)([O-])[O-].[Na+].[Na+].CN(C)C=O>ClCCl.O>[CH3:8][C:5]1[N:4]=[N:3][C:2]([N:17]2[CH2:18][CH2:19][CH:20]([CH2:23][CH2:24][O:25][C:26]3[CH:27]=[CH:28][C:29]([C:30]([O:32][CH2:33][CH3:34])=[O:31])=[CH:35][CH:36]=3)[CH2:21][CH2:22]2)=[CH:7][CH:6]=1
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

7

Edukt 4

HCID 6228DimethylformamideHCID 10340Sodium CarbonateHCID 2272543-Chloro-6-methylpyridazineHCID 23056112Ethyl 4-[2-(4-piperidinyl)ethoxy]benzoate butanedioate

Produkt 1

HCID 71345PirodavirAusbeute 56,8 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962
Water
Lösungsmittel
HCID 6344DichloromethaneLösungsmittel

Reaktionsbedingungen

Temperatur
150 °C

Versuchsvorschrift

A mixture of 10.4 parts of 3-chloro-6-methylpyridazine, 22.4 parts of ethyl 4-[2-(4-piperidinyl)ethoxy]benzoate butanedioate (1:1), 8.6 parts of sodium carbonate and 0.9 parts of N,N-dimethylformamide was stirred for 3 hours in an oil bath at ±150° C. After cooling, water and dichloromethane were added and the layers were separated. The organic layer was dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and ethanol (99:1 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was crystallized from a mixture of 2,2'-oxybispropane and 2-propanone (75:25 by volume). The precipitated product was filtered off and dried, yielding 17 parts (56.8%) of ethyl 4-[2-[1-(6-methyl-3-pyridazinyl)-4-piperidinyl]-ethoxy]benzoate; mp. 130.1° C. (comp. 1).

Aufarbeitung

  1. temperatureAfter cooling
  2. customthe layers were separated
  3. customThe organic layer was dried
  4. filtrationfiltered
  5. customevaporated
  6. customThe residue was purified by column chromatography over silica gel using
  7. additiona mixture of trichloromethane and ethanol (99:1 by volume) as eluent
  8. customThe pure fractions were collected
  9. customthe eluent was evaporated
  10. customThe residue was crystallized from a mixture of 2,2'-oxybispropane and 2-propanone (75:25 by volume)
  11. filtrationThe precipitated product was filtered off
  12. customdried

Quellen und Nachweise

ORD-Eintrag
ord-c0bb6e8ba3744482b41dc34a03e9acfa
Quelldatensatz
uspto-grants-1991_02
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US04992433

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