Fig. 1

Preparation of the title compound and various other intermediates is shown. Compound (1) was prepared following previously published method and is shown above. The synthesis of non-radioactive title compound (2) was prepared as the reference standard and was accomplished by reacting compound (1) with 1-fluoro 2-toluenesulphonyloxyethane. Compound (3) was prepared as precursor for the radiochemical synthesis. The preparation of compound (3) was accomplished by reacting compound (1) with commercially available ditosylethane