Synthesis of 2,6-<i>trans</i>-Tetrahydropyrans Using a Palladium-Catalyzed Oxidative Heck Redox-Relay Strategy
作者:Holly E. Bonfield、Colin M. Edge、Marc Reid、Alan R. Kennedy、David D. Pascoe、David M. Lindsay、Damien Valette
DOI:10.1021/acs.orglett.3c03866
日期:2024.4.12
novel synthetic approaches. We demonstrate the application of a stereoselective Heck redox-relay strategy for the synthesis of functionalized 2,6-trans-tetrahydropyrans in excellent selectivity in a single step from an enantiopure dihydropyranyl alcohol, proceeding through a novel exo-cyclic migration. The strategy has also been applied to the total synthesis of a trans-epimer of the natural product centrolobine
C-芳基-四氢吡喃基序在自然界中普遍存在于许多具有生物活性的天然产物中;然而,这种具有挑战性的架构仍然需要新颖的合成方法。我们展示了立体选择性 Heck 氧化还原-中继策略的应用,通过一种新型的环外迁移,以优异的选择性一步从对映体纯二氢吡喃醇合成官能化 2,6-反式四氢吡喃。该策略还被应用于天然产物centrolobine的反式差向异构体的全合成,具有优异的产率和立体选择性。