Synthesis of tritium-labelled isocarbacyclin derivatives, radiolabelled prostaglandin I1 analogs(1)
Three tritiated isocarbacyclin [9 (O) -metano-Δ6(9α) - prostaglandin I1] derivatives, [11-3H]-isocarbacyclin methyl ester (7a), [11-3H] - (17S)-17-methyl-20-homoisocarbacyclin (9), and its methyl ester (8a) were synthesized. Tritium was introduced to the 11-position via [3H]-sodium tetrahydroborate reduction of 11-dehydro-isocarbacyclin intermediates 10 and 11.