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使用9-Hydroxyxanthene is an Intermediate in the preparation of Propantheline Bromide. It is useful in tests for urea also used in the protection of thiols as their S-xanthenyl (Xan) thioethers, by reaction in the presence of TFA.

一般的な説明Xanthydrol is also known as 9H-xanthen-9-ol. Xanthydrol is a natural drug that has been used in traditional Chinese medicine for treating a variety of diseases. It is extracted from Rhizoma Gastrodiae and Angelicae Dahuricae. It has shown to be effective against various metabolic disorders, including insulin resistance, hyperlipidemia, and diabetes. The mechanism of action of Xanthydrol is not known but it is thought to be due to its ability to activate the immune system by transferring reactions and promoting the production of antibodies. It also shows anti-inflammatory effects by inhibiting the production of prostaglandins and leukotrienes. It can also inhibit angiotensin II, which may reduce high blood pressure and congestive heart failure.

製造方法synthesis of xanthydrol: The amalgam sodium in dry toluene was warmed to 50°C, the xanthone-ethanol suspension was added, and the temperature was rapidly raised to 60-70°C with vigorous stirring. After the reaction is completed, the mercury is separated. The reaction solution was filtered, the filtrate was poured into the stirred blue distilled water, the 9-hydroxyxanthene was filtered out, washed with water, and dried to obtain the finished product with a yield of 91-95%.

純化方法Crystallise xanthydrol from EtOH and dry it at 40-50o. [Beilstein 17 H 129, 17 I 72, 17 II 146, 17 III/IV 1602, 17/4 V 502.]