Synthesis and Properties of Cyclic Keto Alkenylammonium Salts ... Michael E. Jung* and Brian E. Love Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90024, USA ... The cyclic keto alkenylammonium salts (4)-(8) have been prepared by a short, general route and their acidic and electrophilic properties examined. ... For some time now, we have been interested in the synthesis and reactivity of alkenylammonium salts.1 ...