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1-Amino-2-propanol → Oxazolam

HRID 2071959
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 2071959
Br[CH2:2][C:3]([NH:5][C:6]1[CH:19]=[CH:18][C:17]([Cl:20])=[CH:16][C:7]=1[C:8]([C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1)=[O:9])=[O:4].C1(C)C(C)=CC=CC=1.[NH2:29][CH2:30][CH:31](O)[CH3:32].C(N(CC)CC)C>C(Cl)(Cl)Cl.C(OCC)(=O)C.CCCCCC>[Cl:20][C:17]1[CH:18]=[CH:19][C:6]2[NH:5][C:3](=[O:4])[CH2:2][N:29]3[CH2:30][CH:31]([CH3:32])[O:9][C:8]3([C:10]3[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=3)[C:7]=2[CH:16]=1
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

8

Edukt 4

HCID 41-Amino-2-propanolHCID 7237O-XyleneHCID 8471TriethylamineHCID 122906N-(2-benzoyl-4-chlorophenyl)-2-bromoacetamide

Produkt 1

HCID 4617Oxazolam

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 6212ChloroformLösungsmittel
HCID 8058
Hexane
Lösungsmittel
HCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

A solution of 67 g. (0.19 mole) of 2-(2-bromoacetamido)-5-chloro-benzophenone, 500 ml. of xylene, 15.7 g. (0.21 mole) of 1-amino-2-propanol and 25 ml. of triethylamine was stirred at reflux for 20 hours. The reaction mixture was concentrated in vacuo to a residue which was partitioned between methylene chloride and water. The organic layer was washed with water, dried and concentrated to an oil which was crystallized from ethyl acetate to give 18.3 g. of a colorless solid, m.p. 181°-184°. Thin layer chromatography on Eastman alumina plates with an eluant of 3 parts of hexane and 2 parts of ethyl acetate revealed the presence of two compounds. The product was dissolved in chloroform and chromatographed over Woelm neutral alumina I. A mixture concentrated in the above-titled product (the faster of the two compounds) was collected in 30% ethyl acetate-70% hexane. Recrystallizations from methylene chloride gave colorless prisms, m.p. 188°-189°.

Aufarbeitung

  1. temperatureat reflux for 20 hours
  2. concentrationThe reaction mixture was concentrated in vacuo to a residue which
  3. customwas partitioned between methylene chloride and water
  4. washThe organic layer was washed with water
  5. customdried
  6. concentrationconcentrated to an oil which
  7. customwas crystallized from ethyl acetate
  8. customto give 18.3 g
  9. customchromatographed over Woelm neutral alumina I
  10. concentrationA mixture concentrated in the above-titled product (the faster of the two compounds)
  11. customwas collected in 30% ethyl acetate-70% hexane
  12. customRecrystallizations from methylene chloride
  13. customgave colorless prisms, m.p. 188°-189°

Quellen und Nachweise

ORD-Eintrag
ord-6153d6b6591c4012a6b2e0f104213338
Quelldatensatz
uspto-grants-1977_09
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US04049666

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