Sulfonamides as novel terminators of cationic cyclisations.

doi:10.1039/B207755H

Paper

Sulfonamides as novel terminators of cationic cyclisations.

Published Nov 4, 2002 · Charlotte M. Haskins, D. Knight

Chemical communications

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34

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Abstract

Trifluoromethanesulfonic (triflic) acid is an excellent catalyst for inducing overall 5-endo cyclisation of homoallylic sulfonamides [e.g. 4] to give pyrrolidines [e.g. 5]. In competitive experiments, pyrrolidines or homopiperidines are formed in preference to piperidines, even when the latter would be obtained by trapping a tertiary carbocation. Cationic cascades terminated by a sulfonamide group are viable for the efficient formation of polycyclic systems.

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Sulfonamides as novel terminators of cationic cyclisations enable efficient formation of polycyclic systems.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Sulfonamides as novel terminators of cationic cyclisations.

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