作者:Yusuke Akagi、Yuta Mori、Yudai Sato、Erika Iwasaki、Toshiya Komatsu
DOI:10.1016/j.tetlet.2022.153919
日期:2022.7
We report the total synthesis of jadomycins A, B, and l-digitoxosyl-phenanthroviridin. 2-Aryl-5-hydroxy-1,4-naphthoquinones, which were synthesized utilizing a Pd-catalyzed direct arylation of 5-hydroxy-1,4-naphthoquinone with aryl iodide, were converted into jadomycin A through introduction of l-isoleucine, followed by oxidative cyclization. Mitsunobu reaction of jadomycin A with 3,4-di-O-acetyl-l-digitoxose
我们报告了 jadomycins A、B 和 L-digitoxosyl-phenanthroviridin 的全合成。2-Aryl-5-hydroxy-1,4-naphthoquinones 是利用 Pd 催化的 5-hydroxy-1,4-naphthoquinone 与芳基碘的直接芳基化反应合成的,通过引入 L-异亮氨酸转化为 jadomycin A,然后进行氧化环化。由市售的 3,4-二-O-乙酰基-6-脱氧-L-葡糖醛制备的 3,4-二-O-乙酰基-L-洋地黄毒苷与 3,4-二-O-乙酰基-L-洋地黄糖的光信反应,然后脱乙酰化,得到了B. 此外,L-digitoxosyl-phenanthroviridin 的首次全合成通过 phenanthroviridin 苷元与 3,4- di- O-乙酰基-L-digitoxose 的 Mitsunobu 反应成功。