Progress in Heterocyclic Chemistry (PHC) is an annual review series commissioned by the International Society of Heterocyclic Chemistry (ISHC). Volumes in the series contain both highlights of the previous year's literature on heterocyclic chemistry and articles on emerging topics of particular interest to heterocyclic chemists. The chapters in Volume 23 constitute a systematic survey of the important original material reported in the literature of heterocyclic chemistry in 2010.

1. Recent Advances in the Synthesis of Aspidosperma-type Alkaloids 2. Synthesis of Heterocycles by Palladium Catalyzed Intramolecular Heteroarylation 3. Three-Membered Ring Systems 4. Four-membered Ring Systems 5.1 Five-Membered Ring Systems: Thiophenes and Se/Te Derivatives 5.2 Five-Membered Ring Systems: Pyrroles and Benzo Analogs 5.3 Five-Membered Ring Systems: Furans and Benzofurans 5.4 Five Membered Ring Systems: With More than One N Atom 5.5 Five-Membered Ring Systems: With N and S (Se) Atoms 5.6 Five-Membered Ring Systems: With O & S (Se, Te) Atoms 5.7 Five-Membered Ring Systems with O & N Atoms 6.1 Six-Membered Ring Systems: Pyridines and Benzo Derivatives 6.2 Six-Membered Ring Systems: Diazines and Benzo Derivatives 6.3 Triazines, Tetrazines and Fused Ring Polyaza Systems 6.4 Six-Membered Ring Systems: With O and/or S Atoms 7 Seven-Membered Rings 8 Eight-Membered and Larger Rings