A Ring Cyclized Product from the Delepine Reaction

References

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• No advantageous precipitation occurred with chloroform as solvent and a complex mixture (exclusive of starting material by t.l.c.) was formed
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• The ratio of the yields of (I) and (II) was not altered appreciably when the hydrogen chloride concentration was varied in the range 0.1–5M. Hydrolysis using 2M‐aqueous hydrochloric acid led to enhancement of the proportion [ca 3:1 by 1H‐n.m.r. spectral analysis of the acetyl region of the derived acetamides (III) and (IV)] of the non‐cyclized product (1)
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• A full discussion of the spectral assignments will be presented elsewhere
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