AbstractBenzyl chloride‐7‐14C is condensed with 2‐lithio 2‐methyl 1,3‐dithianes. Deprotection with cupric chloride‐copper oxide of the resulting 2‐benzyl 2‐methyl 1,3‐dithianes leads to 1‐phenyl‐2‐propanone‐1‐14C. The latter with L(‐)α‐methylbenzylamine in presence of molecuLar sieve gives rise to (‐)N‐(α‐phen‐ethyl)phenylisopropylimine which is catalytically reduced into the corresponding amine. Hydrogenolysis of this amine gives D(+) amphetamine‐7‐14C isolated as the sulfate with an overall yield of 10 % based on be