Synthesis of 1-(tetrahydrofuran-2-yl)-5-fluorouracil-2-14C) (ftorafur-2-14C)

The synthesis of 1-(tetrahydrofuran-2-yl)-5-fluorouracil-2-14C (Ftorafur-2-14C) has been accomplished by the condensation of 5-fluorouracil-2-14C and 2-chlorotetrahydrofuran using a procedure developed in our laboratory.