Water → 1-Diphenylmethyl-3-methyl-3-(3,4-dimethoxybenzyl)-4-methyl-piperazine

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Reaction Steps

14.5 g of 1-diphenylmethyl-3-methyl-3-(3,4-dimethoxybenzyl)-4-carbethoxy-piperazine (cf. Example 5) are dissolved in 170 ml of dry tetrahydrofuran and added dropwise, with stirring over a period of two hours, to a boiling suspension of 3.42 g of lithium aluminum hydride in 150 ml of dry tetrahydrofuran. The batch is kept at the boiling point for a further 2 hours. After careful addition of water, the mixture is filtered and the filtrate evaporated. The remaining oil is further worked up as in Example 4. 12.4 g (82 percent of theory) of 1-diphenylmethyl-3-methyl-3-(3,4-dimethoxybenzyl)-4-methyl-piperazine are obtained in the form of the dihydrochloride. m.p. = 192° C. (ethanol).

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