Ebook: Advances in Heterocyclic Chemistry, Vol. 19

The present volume consists of four chapters. The first (by Ollis and Ramsden) classifies and discusses the chemistry of that interesting group of compounds known as meso-ionic heterocycles and includes a useful general definition of the term. The second chapter (Litvinov and Gol'dfarb) deals with systems with two (or more) thiophene (or selenophene) rings directly fused together. The 1,2,3-triazines, along with the better-known 1,2,3-benzotri-azines and other fused 1,2,3-triazine systems, are discussed in the third chapter, by Kobylecki and McKillop. In the last chapter George, Khetan, and Gupta treat heterocyclic syntheses which involve the addition of nucleo-philic reagents to acetylenic esters.