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- W2922802340 abstract "A highly efficient acid-promoted, stereospecific, transannular ring-closure of medium-ring ether compounds to the indole alkaloid yohimbine is described. Microwave-enhanced acetic acid degradation of cyanamide compounds involves loss of (R)- or (S)-ethers, followed by a stereospecific, nucleophilic ring-closure from the cyanamide to afford yohimbine in up to 74% yield in as little as one minute. This nucleophilic reactivity of the amino moiety of the cyanamide highlights an alternative reactivity profile from its traditional electrophilic properties. Additionally, this reaction pathway highlights a rare case of an SN1 pathway that proceeds with complete stereospecificity." @default.
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- W2922802340 date "2019-04-01" @default.
- W2922802340 modified "2023-09-23" @default.
- W2922802340 title "Microwave-enhanced, stereospecific ring-closure of medium-ring cyanamide ethers to yohimbine" @default.
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- W2922802340 doi "https://doi.org/10.1016/j.tetlet.2019.03.058" @default.
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