This is the fifteenth annual volume of Progress in Heterocyclic Chemistry, which covers the literature published during 2002. The volume opens with three reviews on current heterocyclic topics. The highlight chapters in Volume 15 are all written by leading researchers in their field and these chapters constitute a systematic survey of the important original material reported in the literature on heterocyclic chemistry in 2002. As with previous volumes in the series, Volume 15 will enable the reader to keep abreast of developments in heterocyclic chemistry in an effortless way. A critical review of the heterocyclic literature published during 2002. Opens with three specialized reviews on new developing topics of interest to heterocyclic chemists. Subsequent chapters review advances in the formation and reaction of heterocyclic rings. Chapters all written by leading researchers in their field.