Abstract
We have synthesized deuterium and carbon-14 labeled enantiomerically pure octahydroindole-2-carboxylic acid (PD0140417), N-methyl octahydroindole-2-carboxylic acid (PD0348183) and their racemic analogs (PD0108405 and PD0338055). [ring-U-14C]PD0140417 was prepared from [ring-U-14C]benzoic acid in a seven-step synthesis in 6.2% overall radiochemical yield. [14C]PD0348183 was prepared from [14C]BaCO3 in a five-step synthesis in 16% radiochemical yield. Additionally, [D]PD0108405 and [D]PD0338055 were synthesized by direct platinum-catalyzed hydrogenation with deuterium gas.
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The author thanks Dr. Laura Greenfield and Dr. Che Huang for helpful discussion during the implementation of this project.
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Zhang, Y. Facile syntheses of isotope-labeled chiral octahydroindole-2-carboxylic acid and its N-methyl analog. J Radioanal Nucl Chem 292, 1371–1376 (2012). https://doi.org/10.1007/s10967-012-1619-z
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DOI: https://doi.org/10.1007/s10967-012-1619-z