title: Synthesis of (-)-callicarpenal, a potent arthropod-repellent.
abstract: Callicarpenal (1), a natural terpenoid isolated from American beautyberry (Callicarpa americana), has shown significant repellent activities against mosquitoes, ticks and imported fire ants. Here we report our efficient synthetic approach to this natural product, and preliminary results of the mosquito biting-deterrent effects of callicarpenal as well as its synthetic precursors and related C(8)-epimers. The synthetic strategy allows rapid access to various epimers and analogues of the natural product that can be used to explore its structure-activity relationship and optimize its biological properties.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0358, USA.
authors.forename: Taotao
authors.initials: T
authors.lastname: Ling
authors.forename: Jing
authors.initials: J
authors.lastname: Xu
authors.forename: Ryan
authors.initials: R
authors.lastname: Smith
authors.forename: Abbas
authors.initials: A
authors.lastname: Ali
authors.forename: Charles L
authors.initials: CL
authors.lastname: Cantrell
authors.forename: Emmanuel A
authors.initials: EA
authors.lastname: Theodorakis