Dichloroacetyl chloride → 2-(Dichloroacetyl)-1,4,4-trimethyl-1,2,3,4-tetrahydroisoquinoline

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By procedures described in Example 1 (Method B), 1-chloro-2-methyl-2-phenyl-propane and acetonitrile were converted to 1-methyl-4,4-dimethyl-1,2,3,4-tetrahydroisoquinoline. A reaction vessel was charged with 4.0 g of this isoquinoline compound and 50 ml methylene chloride. With this mixture stirred, 2 ml dichloroacetyl chloride was added dropwise to the mixture. The mixture was stirred for 20 minutes and then made alkaline with aqueous sodium hydroxide. The organic extract was dried with magnesium sulfate and stripped of solvent. The residue was recrystallized from ethanol to provide 4.2 g of a white cubic-crystal product having the elemental analysis reported in Table I.

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