Benzene → 1-[Bis(hydroxymethyl)-methyl]-6,7-dimethoxy-3,4-dihydroisoquinoline
Reaction equation
[CH2:1]=[O:2].C1C=CC=CC=1.[CH3:9][C:10]1[C:19]2[C:14](=[CH:15][C:16]([O:22][CH3:23])=[C:17]([O:20][CH3:21])[CH:18]=2)[CH2:13][CH2:12][N:11]=1.C[CH2:25][O-:26].[Na+]>>[OH:2][CH2:1][CH:9]([CH2:25][OH:26])[C:10]1[C:19]2[C:14](=[CH:15][C:16]([O:22][CH3:23])=[C:17]([O:20][CH3:21])[CH:18]=2)[CH2:13][CH2:12][N:11]=1Participants
5
Procedure
To a solution of 2.5 moles of paraformaldehyde in 500 ml. of benzene 1 mole (205.3 g) of 1-methyl-6,7-dimethoxy-3,4-dihydroisoquinoline and subsequently freshly prepared sodium ethylate (1 g sodium+50 ml ethanol) are added at room temperature, with stirring. The reaction mixture is refluxed for 4 hours. The mixture is then evaporated under reduced pressure, and the obtained crystalline material is recrystallized from a mixture of acetone and ether. The aimed compound is obtained which has the same melting point as the product prepared in Example 1.