The syntheses of three carboranylpyrroles (5, 10 and 14) bearing carborane
cages in 3-position and/or 4-position of the pyrrole ring, either directly
linked or through a methylene spacer, are described. Tetramerization of two
carboranylpyrroles afforded the corresponding beta -carboranylporphyrins,
as mixtures of type I IV isomers. (C) 2001 Elsevier Science Ltd. All rights
reserved.