Heterocyclic Compounds
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ChemInform Abstract: Preparation of Pyrrole-2-carboxylates with Electron-Withdrawing Groups at the 4-Position.
First published: 14 June 2010
Abstract
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ChemInform Abstract
Alkenyl sulfones, substituted with an electron-withdrawing substituent at the α-position, react with ethyl isocyanoacetate in the presence of base to give 4-substituted pyrrole-2-carboxylates. In the case of (IV), regioisomers are formed. From sulfones (VII) bearing a pentafluoroethyl residue, pyrroles (VIII) and (IX) are obtained.
