Methanol → 5-Acetoxymethyl-4-methoxymethyl-beta-carboline-3-carboxylic acid ethyl ester

HRID 569080Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 569080
C(OC(N=NC(OCC)=O)=O)C.[CH2:13]([O:15][C:16]([CH:18]1[CH:30]([CH2:31][O:32][CH3:33])[C:29]2[C:28]3[C:23](=[CH:24][CH:25]=[CH:26][C:27]=3[CH2:34][O:35][C:36](=[O:38])[CH3:37])[NH:22][C:21]=2[CH:20](C(O)=O)[NH:19]1)=[O:17])[CH3:14].ClCCl.CO>O=O>[CH2:13]([O:15][C:16]([C:18]1[N:19]=[CH:20][C:21]2[NH:22][C:23]3[C:28]([C:29]=2[C:30]=1[CH2:31][O:32][CH3:33])=[C:27]([CH2:34][O:35][C:36](=[O:38])[CH3:37])[CH:26]=[CH:25][CH:24]=3)=[O:17])[CH3:14]

Komponenten

6

Edukt 4

HCID 887MethanolHCID 6344DichloromethaneHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 201323905-Acetoxymethyl-4-methoxymethyl-1,2,3,4-tetrahydro-beta-carboline-1,3-dicarboxylic acid-3 ethyl ester

Produkt 1

HCID 138503625-Acetoxymethyl-4-methoxymethyl-beta-carboline-3-carboxylic acid ethyl esterAusbeute 98,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 977OxygenLösungsmittel

Versuchsvorschrift

90% Azodicarboxylic acid diethyl ester (76 ml) without addition of heat with stirring is added drop by drop to a solution of 5-acetoxymethyl-4-methoxymethyl-1,2,3,4-tetrahydro-beta-carboline-1,3-dicarboxylic acid-3-ethyl ester (75 g) in oxygen-free dichloromethane (0.6 l) under argon protection. The temperature rises about 10° C. Reflux is performed for about 9 hours, then the mixture is left at room temperature for 60 hours. The precipitate is suctioned off, further end product can be obtained from the evaporated mother liquor after chromatography on silica gel with a mixture of dichloromethane (95%) with methanol (5%). Altogether 65 g of the title compound in the form of colorless crystals with a melting point of 129°-133° C. is obtained.

Aufarbeitung

  1. temperatureof heat
  2. customrises about 10° C
  3. temperatureReflux
  4. waitthe mixture is left at room temperature for 60 hours
  5. customfurther end product can be obtained from the evaporated mother liquor after chromatography on silica gel

Quellen und Nachweise

ORD-Eintrag
ord-c9c8f4abbac041a0bf1cdb8b0633c1d3
Quelldatensatz
uspto-grants-1988_03
Patentnummer
US04731365

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