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Extension of the Scope of Anionic Cycloadditions by Activating Organoelement Groups

1977; Wiley; Volume: 16; Issue: 2 Linguagem: Inglês

10.1002/anie.197701191

1521-3773

Thomas Kauffmann, Holger Ahlers, Angelika Hamsen, Herbert Schulz, Hans‐Joachim Tilhard, Annemarie Vahrenhorst,

Asymmetric Synthesis and Catalysis

Activation of olefins in the anionic cycloaddition of 2-azaallyl compounds such as (1) can be accomplished by the organoelement groups SPh, SePh, PPh2 and AsPh2. They can be removed from the cycloadducts (2) with relative ease.