SUMMARYThe synthesis of specifically labeled 6,4-dimethyl-benzenebutanoic acid-l-C, 3,4-Dihydro-3,7-dirnethyl-l(2fJ)-naphthalen~ne-L-~~C, 2,6-dimethyl-l,2,3,4-tetrahydronaphthalene-4-13 C and Z,L-dimethylnaphthale~~e-i-'~c from Diethyl 2-(4-methylphenyl)-2-methylpropanediate is described.
13Key Words: 6,4-Dimethyl-benzenebutanoic acid-l-l3S, 3,4-dihydro-3,7-dimethyl-1 ( 2E) -napht ha 1 enone-l-3C, 2,6-d ime thy 1 -1 ,2 ,3,4-t e t r a hy d ronap h t ha 1 ene-4-3C and 2,6-dimethylnaphtha1ene-i-13c.