Add time:08/02/2019 Source:sciencedirect.com
Procedures are given for the preparation of (1-14C),(5,8-3H)tetralin,(2-14C),(5,8-3H)tetralin, (1-14C),(7-3H)decalin and (2-14C),(7-3H)decalin. Tetralin labeled with 14C in the aromatic ring was prepared from tetralol labeled with 14C in the aliphatic ring by conversion to naphthol and selective hydrogenation of the hydroxylated ring. Decalin specifically labeled with tritium was prepared by catalytic reduction of tritiated tetralin. The 1-14C-labeled compounds were obtained from 14CO2 in a 5- or 9-step synthesis with an overall yield of (X) and 25°, respectively, the 2-14C-labeled compounds in a 9-or 13-step synthesis with an overall yield of 35 or 18%, respectively. The specificity of the 14C-labeling was in all cases better than 95%.
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