Progress in Heterocyclic Chemistry (PHC), Volume 30, the latest in this annual review series commissioned by the International Society of Heterocyclic Chemistry (ISHC), contains both highlights of the previous year's literature on heterocyclic chemistry and articles on new and developing topics of interest. Chapters in this updated volume are all written by leading researchers in their field, providing a systematic survey of the important, original material reported in literature in 2017. As with previous volumes in the series, this update will enable academics, industrial chemists and advanced students to keep abreast of developments in heterocyclic chemistry in a convenient resource.