
Tetrahedron Letters p. 8075 - 8078 (1995)
Update date:2022-08-03
Topics:
Black, David StC.
Craig, Donald C.
Kumar, Naresh
Some 7-hydroxymethyl-3-aryl-4,6-dimethoxyindoles 1 undergo acid catalysed cyclotetramerisation in addition to cyclotrimerisation to give the calix[4]indoles 3 as well as the calix[3]indoles 2: the tetramers 3, which display a 1,3-alternate cube-like structure, can also be obtained by the acid catalysed dimerisation of 7-hydroxymethyl-2,7'-diindolylmethanes 7.
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