A green approach for efficient synthesis of N-substituted pyrroles in ionic liquid under microwave irradiation

A rapid synthesis of N-substituted pyrroles has been described by the reaction of 4-hydroxyproline with isatins in ionic liquid under microwave irradiation. The recovered ionic liquid was reused for six cycles. The reaction proceeds without addition of any acid promoter (C) 2010 Elsevier Ltd. All rights reserved.