期刊
NEW JOURNAL OF CHEMISTRY
卷 47, 期 45, 页码 20814-20817出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3nj04527g
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A practical asymmetric synthesis method of (S)-forphenicinol, the active ingredient of immunomodulator and anticancer drug Forfenimex (R), from commercially available 2-hydroxy-dimethylterephthalate has been developed. The key steps of the synthesis involve a stereogenic-center-forming enantioselective organocatalytic Mannich reaction and oxidative transformation of the gamma-pyrone fragment, resulting in a significantly higher total yield compared to known methods.
Practical asymmetric synthesis of (S)-forphenicinol, the active ingredient of immunomodulator and anticancer drug Forfenimex (R), from commercially available 2-hydroxy-dimethylterephthalate has been developed. Key steps of the synthesis are a stereogenic-center-forming enantioselective organocatalytic Mannich reaction of protected arylcarbaldimine with a kojic acid derivative and oxidative transformation of the gamma-pyrone fragment into the carboxylic group. The total yield of (S)-forphenicinol hydrochloride (99% ee) via the proposed nine-step synthetic scheme (17%) is significantly higher than those attained by known methods (4.6% and 0.8%).
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