3-Hydroxybenzaldehyde → HCID 67442708, compound

Participants

Reaction Steps

1.00 g (4.30 mmol) of the commercially available 2-amino-3-(1H-indol-3-yl)-2-methyl-propionic acid methyl ester are reacted with 600 mg (4.73 mmol) 3-hydroxy-benzaldehyde in the presence of trifluoroacetic acid according to the Pictet-Spengler reaction. The resulting mixture of diastereomers is separated by column chromatography (toluene, ethyl acetate 4:1). 1.17 g (68%) of the title compound and 320 mg (14%) of (1SR,3SR)-1-(3-hydroxy-phenyl)-3-methyl-2,3,4,9-tetrahydro-1H-β-carboline-3-carboxylic acid methyl ester (compound A2) are obtained as white solids.

Provenance & Evidence