Synthesis

A short route to heteroarylcarbazoles: Synthesis of new pyrazolylcarbazoles and carbazolylquinolines

R Nagarajan, PT Perumal

Index: Nagarajan, Rajagopal; Perumal, Paramasivan T. Synthesis, 2004 , # 8 p. 1269 - 1273

Full Text: HTML

Citation Number: 15

Abstract

Abstract A short synthesis of pyrazolylcarbazoles from 9-alkylcarbazoles in three steps is reported. The acetylcarbazoles prepared by the acetylation of carbazoles with acetic anhydride catalyzed by BiCl 3 were converted into chloroaldehydes with Vilsmeier reagent. Condensation of chloroaldehydes with hydrazine followed by cyclization yield the pyrazolylcarbazoles. Carbazolyl chalcones were prepared by the condensation of ...