Synthesis of Side-Chain Unsaturated<i>endo</i>- and<i>exo</i>-Brevicomins. Representatives of Pheromone Analogs in the Dioxabicyclo[3.2.1]octane Series
作者:Stefan Wershofen、H. -D. Scharf
DOI:10.1055/s-1988-27729
日期:——
The title substances endo- and exo-9 were synthesized via selective trans- and cis-opening of the epoxy tosylate 3, respectively. The tosylate 3 is easily obtainable from pentadienol 1.
Limited diastereoselectivity on addition of γ-alkoxy-z-allylboronates to aldehydes
作者:Reinhard W. Hoffmann、Bruno Kemper
DOI:10.1016/s0040-4039(00)86964-6
日期:1982.1
Microwave-Assisted Synthesis of Substituted Tetrahydropyrans Catalyzed by ZrCl<sub>4</sub> and Its Application in the Asymmetric Synthesis of <i>exo</i>- and <i>endo</i>-brevicomin
作者:Surendra Singh、Patrick J. Guiry
DOI:10.1021/jo901019u
日期:2009.8.7
ZrCl4-catalyzed deprotection of 1,3-dioxane/dioxalane and the simultaneous formation of 6-methoxy-substituted tetrahydropyrans proceeded under microwave irradiation in good yield. This synthetic methodology was used for the asymmetric synthesis of (+)-exo- and (+)-endo-brevicomin in 55% overall yield over 4 steps.