Tetrahedron

Sulfur-containing polybromoindoles from the red alga Laurencia brongniartii

J Tanaka, T Higa, G Bernardinelli, CW Jefford

Index: Tanaka, Jun'ichi; Higa, Tatsuo; Bernardinelli, Gerald; Jefford, Charles W. Tetrahedron, 1989 , vol. 45, # 23 p. 7301 - 7310

Full Text: HTML

Citation Number: 45

Abstract

Six new polybromoindoles (9-14) have been isolated from the red alga Laurencia brongniartii. Two were optically active sulfoxides, the itomanindoles A (12) and B (13) and one was a bisindole (14). The structures of 12 and 14 were elucidated by X-ray analysis. The sulfoxides 12 and 13 were readily converted with diazomethane to the corresponding N- methyl derivatives. Treatment with acetic anhydride at room temperature gave the same ...