Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 7008530, Japan.
J Nat Prod. 2022 Aug 26;85(8):2122-2125. doi: 10.1021/acs.jnatprod.2c00559. Epub 2022 Aug 17.
Echinosulfonic acid D, a sponge metabolite whose structure was recently reassigned, was synthesized for the first time. The key step is the double indolization of dimethylbarbituric acid using the umpolung indole reagent, followed by a hydrolysis/decarboxylation/esterification sequence.
棘海酸 D,一种最近重新分配结构的海绵代谢产物,首次被合成。关键步骤是使用反转吲哚试剂使二甲基巴比妥酸进行双吲哚化,然后进行水解/脱羧/酯化序列。