He received his Ph.D. in 2004 in. 1. Introduction Cascade reactions constitute a fascinating branch of organicchemistry,andonewhichhasbeenthesubjectof. Often synthesis reactions require a catalyst, as seen in the third example above. This is especially true when two solids are reacting with each other. Browse the journal by issue number or author, see the most-read and most-cited articles, and find submission and review guidelines.