Hydroquinone → Butyl 6-ethoxy-3-methyl-3,6-dihydro-2H-pyran-2-carboxylate

HRID 1973347

Reaktionsgleichung

Reaktionsgleichung von HRID 1973347
[CH2:1]([O:3][CH:4]=[CH:5][CH:6]=[CH:7][CH3:8])[CH3:2].[C:9]([O:13][CH2:14][CH2:15][CH2:16][CH3:17])(=[O:12])[CH:10]=[O:11].C1(C=CC(O)=CC=1)O>C(Cl)Cl>[CH2:14]([O:13][C:9]([CH:10]1[CH:7]([CH3:8])[CH:6]=[CH:5][CH:4]([O:3][CH2:1][CH3:2])[O:11]1)=[O:12])[CH2:15][CH2:16][CH3:17]

Komponenten

5

Edukt 3

HCID 785HydroquinoneHCID 80521Butyl oxoacetate2×HCID 537696421-Ethoxy-1,3-pentadiene2×

Produkt 1

HCID 23338794Butyl 6-ethoxy-3-methyl-3,6-dihydro-2H-pyran-2-carboxylate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

Following the procedure of Example 12, a solution of 26.7 g. (0.226 mol) of 1-ethoxy-1,3-pentadiene (purity, 95%), 32.5 g. (0.25 mol) of butyl glyoxylate and 0.250 g. of hydroquinone in 250 ml. of methylene chloride was refluxed for 48 hours to give 28.0 g. of a mixture of 1-ethoxy-1,3-pentadiene and butyl glyoxylate and 20.32 g. of distilled 2H-pyran butyl ester (b1.0 = 100°-110° ) as an oil. Yield based on 1-ethoxy-1,3-pentadiene, 34%.

Aufarbeitung

  1. customto give 28.0 g
  2. customYield

Quellen und Nachweise

ORD-Eintrag
ord-fe0d84f6e20d4d2aaf47db79d103cbfc
Quelldatensatz
uspto-grants-1976_12
Patentnummer
US03997529

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