Solid-Phase Selenium-Catalyzed Selective Allylic Chlorination of Polyprenoids: Facile Syntheses of Biologically Active Terpenoids
作者:Alejandro F. Barrero、José F. Quílez del Moral、M. Mar Herrador、Manuel Cortés、Pilar Arteaga、Julieta V. Catalán、Elena M. Sánchez、Jesús F. Arteaga
DOI:10.1021/jo060760d
日期:2006.7.1
Regioselective halogenation of the terminal isopropylidene unit of different acyclic polyolefinic polyprenoids (farnesyl acetate, geranylgeranylacetate, squalene, etc.) using NCS/catalytic polymer-supported selenenyl bromide is described; good to excellent yields are obtained (68−96%). The first applications of this protocol include the concise synthesis of bioactive terpenoids 1−3.