Journal
TETRAHEDRON LETTERS
Volume 43, Issue 22, Pages 4075-4078Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(02)00682-2
Keywords
diindolylalkanes; vibrindole A; green synthesis; clay
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Dry reaction of indoles 1a-c with aldehydes 2a-i. ketones 2j-o and an acetal 2p on M. K10 clay at room temperature furnished 3,3'-diindolylalkanes (DIAs: 3a-h, j-r). The novel formation of tris(3-indolyl)methane 4 from 2i through tandem reactions and of the DIAs 6 and 8 from 1d through Plancher rearrangements were also observed. (C) 2002 Elsevier Science Ltd. All rights reserved.
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