Abstract
I WOULD like to congratulate the authors on these syntheses, which are fundamental for the theory. My own synthesis, mentioned in 1936, employed acetonedicarboxylic acid in excess, but was otherwise identical. Though the product was undoubtedly dl-hygrine, the opportunity to add the final touches necessary for publication did not occur.
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ROBINSON, R. Syntheses of Hygrine and Cuscohygrine. Nature 163, 289 (1949). https://doi.org/10.1038/163289b0
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DOI: https://doi.org/10.1038/163289b0
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