Journal
TETRAHEDRON LETTERS
Volume 42, Issue 32, Pages 5545-5547Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(01)01031-0
Keywords
orthoesters; pyrroles
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Reactions between triethyl orthoformate, trimethyl orthoacetate and triethyl orthopropionate with pyrrole and chloroacetic acid lead to moderate yields of the corresponding tri-(pyrrol-2-yl)alkanes 5a, 5b and 5c, respectively. Under the same conditions, trimethyl orthobenzoate reacts with pyrrole and dichloroacetic acid to give the dipyrrin 7 in a relatively good yield. (C) 2001 Elsevier Science Ltd. All rights reserved.
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