Ethyl chloroformate → [(3-Phenyl-5-isoxazolyl)methyl]carbamic acid, ethyl ester

HRID 1395467Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1395467
[NH2:1][CH2:2][C:3]1[O:7][N:6]=[C:5]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[CH:4]=1.Cl[C:15]([O:17][CH2:18][CH3:19])=[O:16]>N1C=CC=CC=1>[C:8]1([C:5]2[CH:4]=[C:3]([CH2:2][NH:1][C:15](=[O:16])[O:17][CH2:18][CH3:19])[O:7][N:6]=2)[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=1

Komponenten

4

Edukt 2

HCID 10928Ethyl chloroformateHCID 27641651-(3-Phenyl-1,2-oxazol-5-yl)methanamine

Produkt 1

HCID 60025831[(3-Phenyl-5-isoxazolyl)methyl]carbamic acid, ethyl ester

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1049PyridineLösungsmittel

Versuchsvorschrift

A 7 g. portion of the product of Example 8 was dissolved in 50 ml. of pyridine, cooled in an ice bath, and combined with 10 ml. of ethyl chloroformate. The mixture was stirred at ice bath temperature for 1 hour and allowed to warm to room temperature while being stirred for 2 hours more. The mixture was then poured into ice water and the crude product was separated by filtration and purified by chromatography over silica gel with ethyl acetate as the eluent. The yield was 6 g. of purified [(3-phenyl-5-isoxazolyl)-methyl]carbamic acid, ethyl ester, m.p. 82°.

Aufarbeitung

  1. stirringwhile being stirred for 2 hours more
  2. customthe crude product was separated by filtration
  3. custompurified by chromatography over silica gel with ethyl acetate as the eluent

Quellen und Nachweise

ORD-Eintrag
ord-4edfe7e2cbfd425f883b105bd6819834
Quelldatensatz
uspto-grants-1980_05
Patentnummer
US04203994

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