Toluene → (+/-)-5,6,6a,7-tetrahydro-2,3-dimethoxy-9,10-methylenedioxy-5-methyl-4H-dibenz(de,g)isoquinoline

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Reaction Steps

10.65 g. (±)-5,6,6a,7-tetrahydro-3-hydroxy-2-methoxy-9,10-methylenedioxy-5-methyl-4H-dibenz(de,g)isoquinoline trifluoroacetate (see Example 1) are dissolved in 500 ml. of a mixture of toluene and dimethyl formamide (9:1) in a manner analogous to that described in Example 7 and methylated with phenyltrimethyl ammonium hydroxide. When the methylation is finished (monitoring with TLC), the reaction mixture is evaporated in a vacuum. After partitioning the residue between water and methylene chloride, working up the organic phase and crystallising from methanol/chloroform, there is obtained (±)-5,6,6a,7-tetrahydro-2,3-dimethoxy-9,10-methylenedioxy-5-methyl-4H-dibenz(de,g)isoquinoline in the form of cream-coloured crystals; m.p. 169°-172° C.

Provenance & Evidence