Formaldehyde → HCID 13041786, Verbindung

Reaktionsgleichung

[CH2:1]([O:3][C:4](=[O:20])[C@H:5]([CH:7]([CH2:17][O:18][CH3:19])[C:8]1[C:16]2[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=2)[NH:10][CH:9]=1)[NH2:6])[CH3:2].[CH2:21]=O.O>C1C=CC=CC=1>[CH2:1]([O:3][C:4]([C:5]1[N:6]=[CH:21][C:9]2[NH:10][C:11]3[C:16]([C:8]=2[C:7]=1[CH2:17][O:18][CH3:19])=[CH:15][CH:14]=[CH:13][CH:12]=3)=[O:20])[CH3:2]

Komponenten

Versuchsvorschrift

20.3 g of beta-methoxymethyl-tryptophane-ethylester is dissolved in 350 ml of benzene, mixed with 2.48 g of paraformaldehyde and heated for 3.5 h in the water separator. After cooling, the benzene is distilled off, the residue is absorbed in 350 ml of toluene, and after adding 4.5 g of 10% palladium carbon, the mixture is heated with reflux for 20 h. The cooled solution is filtered and concentrated. The residue is chromatographed on silica gel with hexane/ethyl-acetate. The crystallization of the main fraction out of ethylacetate/diisopropylether yields 6.4 g of 4-methoxymethyl-beta-carboline-3-carboxylic-acid-ethylester with a m.p. 118°-119° C.