Methyl Isocyanate → 1-Methylcarbamoyloxy-2,4-dimethoxynaphthalene

HRID 466213

Reaktionsgleichung

Reaktionsgleichung von HRID 466213
[OH:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5]([O:12][CH3:13])=[CH:4][C:3]=1[O:14][CH3:15].[CH3:16][N:17]=[C:18]=[O:19]>O1CCCC1.CN(C)C1C=CN=CC=1>[CH3:16][NH:17][C:18]([O:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5]([O:12][CH3:13])=[CH:4][C:3]=1[O:14][CH3:15])=[O:19]

Komponenten

5

Edukt 2

HCID 12228Methyl IsocyanateHCID 125635471-Hydroxy-2,4-dimethoxynaphthalene

Produkt 1

HCID 141830391-Methylcarbamoyloxy-2,4-dimethoxynaphthalene

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 142844-(Dimethylamino)pyridineKatalysatorHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To a solution of 1.00 g of 1-hydroxy-2,4-dimethoxynaphthalene, prepared as shown in Preparations 7 and 8, in 50 ml of tetrahydrofuran was added 0.335 g of methyl isocyanate followed by 0.12 g of 4-dimethylaminopyridine. The solution was stirred at room temperature overnight. The solvent was removed under reduced pressure and the residue dissolved in ethyl acetate, washed with dilute hydrochloric acid and dried over anhydrous sodium sulfate. The solvent was removed under reduced pressure and the residue chromatographed on silica gel, eluting with methylene chloride, giving 1-methylcarbamoyloxy-2,4-dimethoxynaphthalene, m.p. 131°-133° C.

Aufarbeitung

  1. customThe solvent was removed under reduced pressure
  2. dissolutionthe residue dissolved in ethyl acetate
  3. washwashed with dilute hydrochloric acid
  4. dry with materialdried over anhydrous sodium sulfate
  5. customThe solvent was removed under reduced pressure
  6. customthe residue chromatographed on silica gel
  7. washeluting with methylene chloride

Quellen und Nachweise

ORD-Eintrag
ord-53588902e90946a99fa5a6e117a7da96
Quelldatensatz
uspto-grants-1992_10
Patentnummer
US05155132

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