(4R,6S)-4-(tert-Butyldimethylsilyloxy)-6-formyltetra-hydro-2H-pyran-2-one has been prepared for the first time by oxidation of alcohol (4R,6S)-4-(tert-butyldimethylsilyloxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-2-one. The oxidation of the alcohol was performed with Dess-Martin periodinane in up to 95% yield. Because of limited stability of the aldehyde, it was isolated in the form of hydrate for isolation and storage purposes. The latter can be dehydrated back to the aldehyde quantitatively by simple dissolution in an apolar organic solvent followed by removal of volatiles. The aldehyde was demonstrated to undergo Wittig olefination in high yield. Presented findings set a key platform for statin synthesis via lactonized side chain.
(4R,6S)-4-(tert-Butyldimethylsilyloxy)-6-formyltetra-hydro-2H-pyran-2-one 首次由 (4R,6S)-4-(tert-butyldimethylsilyloxy)-6-(hydroxymethyl)tetra-hydro-2H-pyran-2-one 醇氧化制备而成。用 Dess-Martin 期间烷进行醇的氧化,收率高达 95%。由于醛的稳定性有限,因此以
水合物的形式分离出来,用于分离和储存。后者可以通过简单地溶解在无极性有机溶剂中,然后去除挥发物,定量脱
水成醛。实验证明,这种醛能以高产率进行维蒂希烯化反应。这些发现为通过内酯化侧链合成他汀类药物提供了一个关键平台。