(E)-β-Borylstyrene in the Diels–Alder Reaction with 3,5-Dibromo-2-pyrone for the Syntheses of (±)-1-epi-Pancratistatin and (±)- Pancratistatin
摘要:
New synthetic routes to (+/-)-1-epi-pancratistatin and (+/-)-pancratistatin were devised using (E)-beta-borylstyrene as a dienophile for the key Diels-Alder reaction with 3,5-dibromo-2-pyrone. The boronate in the cycloadduct was oxidized to provide the pivotal C1-hydroxyl group of the titled compounds.
(E)-β-Borylstyrene in the Diels–Alder Reaction with 3,5-Dibromo-2-pyrone for the Syntheses of (±)-1-epi-Pancratistatin and (±)- Pancratistatin
摘要:
New synthetic routes to (+/-)-1-epi-pancratistatin and (+/-)-pancratistatin were devised using (E)-beta-borylstyrene as a dienophile for the key Diels-Alder reaction with 3,5-dibromo-2-pyrone. The boronate in the cycloadduct was oxidized to provide the pivotal C1-hydroxyl group of the titled compounds.