Protective Group-Free Syntheses of (±)-Frontalin, (±)-endo-Brevicomin, (±)-exo-Brevicomin, and (±)-3,4-Dehydro-exo-brevicomin: Racemic Pheromones with a 6,8-Dioxabicyclo[3.2.1]octane Ring
Protective Group-Free Syntheses of (±)-Frontalin, (±)-endo-Brevicomin, (±)-exo-Brevicomin, and (±)-3,4-Dehydro-exo-brevicomin: Racemic Pheromones with a 6,8-Dioxabicyclo[3.2.1]octane Ring
Application of the carbonyl epoxide rearrangement to the formation of dioxabicycloalkanes and alkenes. Synthesis of the mus musculus pheromone.
作者:Harry H. Wasserman、Steven Wolff、Teruo Oku
DOI:10.1016/s0040-4039(00)85095-9
日期:1986.1
Acid-catalyzed intramolecular opening of epoxides by carbonyl groups provides a general stereocontrolled method for forming dioxabicyclo systems, including the (±)- Musmusculuspheromone and products corresponding to certain insect pheromones.
Protective Group-Free Syntheses of (±)-Frontalin, (±)-<i>endo</i>-Brevicomin, (±)-<i>exo</i>-Brevicomin, and (±)-3,4-Dehydro-<i>exo</i>-brevicomin: Racemic Pheromones with a 6,8-Dioxabicyclo[3.2.1]octane Ring
作者:Kenji MORI
DOI:10.1271/bbb.110071
日期:2011.5.23
Protective group-free syntheses of four racemic pheromones with a 6,8-dioxabicyclo[3.2.1]octane ring were achieved in five or six steps from commercially available (±)-3-butyn-2-ol (6) and 2-alkenyl halides or 2-alken-1-ol by employing Lewis acid-catalyzed acetalization of δ, ε-epoxy ketones as the key reaction. (±)-Frontalin (1) was prepared in a 25% overall yield in five steps from methallyl chloride (5a), (±)-endo-brevicomin (2) was prepared in a 23% overall yield in five steps from (E)-2-pentenyl bromide (5b), and (±)-exo-brevicomin (3) and (±)-3,4-dehydro-exo-brevicomin (4) were both prepared in a 4% overall yield in six steps based on (Z)-2-penten-1-ol (12).