Methylene Chloride as a Reagent for Cyclizations with SO3 as HCl Trapping Agent

Authors

  • Prof. Dr. Herbert W. Roesky,

    1. Anorganisch-chemisches Institut I der Universität, Niederurseler Hang, D-6000 Frankfurt am Main 50 (Germany)
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  • Minoru Aramaki,

    1. Anorganisch-chemisches Institut I der Universität, Niederurseler Hang, D-6000 Frankfurt am Main 50 (Germany)
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    • Central Glass Co., Ltd., Tokio (Japan).

  • Lothar Schonfelder

    Corresponding author
    1. Anorganisch-chemisches Institut I der Universität, Niederurseler Hang, D-6000 Frankfurt am Main 50 (Germany)
    • Anorganisch-chemisches Institut I der Universität, Niederurseler Hang, D-6000 Frankfurt am Main 50 (Germany)
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  • This work was supported by the Deutsche Forschungsgemeinschaft.

Abstract

original image

CH2Cl2 is not always an inert solvent: in the presence of SO3, which serves as HCl trapping reagent, it reacts with sulfonamides at room temperature to give the 1,3,5-triazine derivative (1).

Ancillary