Tetrahedron Letters

Synthesis of C 2-symmetric bis-indolyl sulfones

T Mitra, S Das, A Basak

Index: Mitra, Tapobrata; Das, Sanket; Basak, Amit Tetrahedron Letters, 2009 , vol. 50, # 42 p. 5846 - 5849

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Citation Number: 8

Abstract

A new class of C2-symmetric bis-indole derivatives with 2, 2′-linkage has been synthesized from bis-propargyl sulfones. The method involves treatment of the sulfones with catalytic amount of triethylamine to form the indole derivatives presumably via the intramolecular Michael addition to the intermediate bis-allenic sulfones. Interestingly, the expected Garratt-Braverman pathway was not followed.