INTRODUCTION OF THE PYRAZOLIDINE RING INTO THE PYRROLE RING OF INDOLE

Article abstract of DOI:10.1007/BF00472482

The reaction of indoles with 1-acyl-5-hydroxypyrazolidines under heterogeneous catalysis conditions leads, depending on the structure of indole, to 2- and/or 3-(1-acyl-5-pyrazolidinyl)indoles.Thus, the formation of 2-pyrazolidinylindoles is the results of an unco-substitution at the 3-position of the indole, followed by migration of the pyrazolidine ring.