Synthesis of spiropentacyclic indolines by cyclisation of 3,4-dimethoxyphenylacetyltryptamine
- 1 January 1983
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 2,p. 85-86
- https://doi.org/10.1039/c39830000085
Abstract
Cyclisation of N-(3,4-dimethoxyphenylacetyl)tryptamine (4) with either phosphorus trichloride, or phosphoryl chloride, affords the spirocyclic indolin (12) together with small amounts of β-carboline derivatives, whereas with trifluoroacetic anhydride as reagent the spirocyclic indoline(13) is formed in quantitative yield.Keywords
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