17 (R)-OH-AA and 14, 15-dehydro-17 (R)-OH-AA were synthesized from a common tetraacetylenic precursor and their azide derivatives were obtained in moderate yields via the corresponding p-toluenesulfonates. Since the azido group remained stable during tritiation procedure on Lindlar's catalyst in benzene, both 14, 15-dehydro-17 (S)-N3-AA and 14, 15-dehydro-17 (R)-OH-AA constitute useful intermediates in the synthesis of radio- ...