Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, Tokyo, Japan.
Biosci Biotechnol Biochem. 2021 Jan 7;85(1):143-147. doi: 10.1093/bbb/zbaa021.
Prunetin (4',5-dihydroxy-7-methoxyisoflavone) was semisynthesized in 8 steps from readily available naringenin in 26% total yield. The key reaction was chemoenzymatic sequential deacetylation to 6'-acetoxy-2',4″-dihydroxy-4'-methoxychalcone, the in situ-formed precursor for thallium(III) nitrate-mediated oxidative rearrangement.
紫檀芪(4',5-二羟基-7-甲氧基异黄酮)可由易于获得的柚皮素经 8 步反应以 26%的总收率半合成得到。关键反应是化学酶促顺序脱乙酰化生成 6'-乙酰氧基-2',4″-二羟基-4'-甲氧基查耳酮,这是三硝酸铊介导的氧化重排的原位形成前体。