Intramolecular aldol-type condensation between side chains of naphthoquinones: biomimetic synthesis of 1,6- and 1,8-dihydroxyanthraquinonesElectronic supplementary information (ESI) available: preparation and experimental details of acetonylquinones. See http://www.rsc.org/suppdata/p1/b1/b104789m/
作者:Hidemitsu Uno、Akane Masumoto、Erina Honda、Yumi Nagamachi、Youtarou Yamaoka、Noboru Ono
DOI:10.1039/b104789m
日期:2001.11.29
K2CO3 in alcohol brought about the intramolecular Knoevenagel-type reaction to give 3-hydroxy-8-methoxy-1-methyl-9,10-dioxo-9,10-dihydro-anthracene-2-carboxylates in good yields, while the same naphthoquinone gave 4-hydroxy-5-methoxy-9,10-dioxo-9,10-dihydroanthracene-2-acetic acid in good yield by treatment with potassium bis(trimethylsilyl)amide (KHMDS). Chrysophanol, aloe-emodin, aloesaponarin I,
在碱性条件下2-(丙酮基)-3-酰基juglone衍生物的分子内缩合得到1,6-和/或1,8-二羟基蒽醌,这取决于所采用的条件。治疗6-[(3-乙酰基-5-甲氧基-1,4-二氧代-1,4-二氢-2-萘基)甲基] -2,2-二甲基-4 H -1,3-二恶英-4-一与K 2 CO 3 in酒精 引起分子内的Knoevenagel型反应,以良好的收率得到3-羟基-8-甲氧基-1-甲基-9,10-二氧代-9,10-二氢蒽-2-羧酸酯 萘醌 给了 4-羟基-5-甲氧基-9,10-二氧代-9,10-二氢蒽-2-乙酸 通过处理获得良好的收成 双(三甲基甲硅烷基)氨基钾 (KHMDS)。 ry酚, 芦荟-大黄素,芦荟皂苷I和K1115A的制备得率很高。