1,3-Disubstitutedpyrazole-4-caboxaldehyde in Heterocyclic Synthesis: A Novel Synthesis of Pyridine-2(1H)-thione and Fused Nitrogen and/or Sulfur Heterocyclic Derivatives

Synthesis of Biologically Active Heterocycles via a Domino Sequence Involving an SN2/Thorpe–Ziegler Reaction Step

This review highlights methods for the synthesis of five- and six-membered heterocycles and their annulated analogues. These methods are based on anionic domino reactions that have a common step: an SN2/Thorpe–Ziegler reaction. In addition, data on the biological activity of these heterocycles are summarized.

1 Introduction

2 Synthesis of Thiophenes, Pyrroles, Furans and Other Heterocycles

2.1 Synthesis of 3-Aminothiophenes

2.2 Synthesis of 3-Aminopyrroles

2.3 Synthesis of 3-Aminofurans

3 Synthesis of Bicyclic Heterocyclic Systems

3.1 Thiophenes, Pyrroles and Furans Fused with Five-Membered Heterocycles

3.2 Thiophenes, Pyrroles and Furans Fused with Six-Membered Heterocycles

4 Synthesis of Heterocyclic Compounds Using Three-Step Domino Reactions

5 Synthesis of Heterocyclic Compounds Based on a Combination of Two Domino Reactions

6 Miscellaneous

7 Conclusion