OXIDATION OF UNACTIVATED CARBON ATOMS OF LUPANE AND FRIEDELANE-TYPE TRITERPENES WITH<i>m</i>-CHLOROPERBENZOIC ACID
作者:Motoo Tori、Reiko Matusuda、Yoshinori Asakawa
DOI:10.1246/cl.1985.167
日期:1985.2.5
The reaction of lupan-3β,28-diyl diacetate, lupan-3β-yl acetate, and friedelan-3β-yl acetate with m-chloroperbenzoic acid gave their hydroxy or keto derivatives upon oxidation of unactivatedcarbonatoms.
lupan-3β,28-diyl diacetate, lupan-3β-yl acetate, and Friedelan-3β-yl acetate 与间氯过苯甲酸反应,在未活化的碳原子氧化时得到它们的羟基或酮衍生物。
The Reaction of Lupane and Friedo-Oleanane Type Triterpenes with<i>m</i>-Chloroperbenzoic Acid
Lupane-3β,28-diol, lupan-3β-ol, and friedelan-3β-ol were treated with m-chloroperbenzoic acid (mCPBA) in refluxing chloroform to afford corresponding lactones in one step, while lupane-3β,28-diyl diacetate, lupan-3β-yl acetate, and friedelan-3β-yl acetate to give hydroxylated or keto derivatives. Similar reaction of dendropanoxide with mCPBA yielded 6β-, 7β-, 21α-, and 22β-hydroxylated compounds.
作者:Churng-Werng Chang、Tien-Shung Wu、Yih-Shou Hsieh、Sheng-Chu Kuo、Pei-Dawn Lee Chao
DOI:10.1021/np980313w
日期:1999.2.1
A new natural product, 4-epifriedelin (1), and 12 known terpenoids have been isolated from the leaves of Syzygium formosanum. The known compounds include caryophyllene oxide, friedelin, canophyllal, glutinol, alpha-terpineol, phytol, betulinic acid, uvaol, lupeol, betulin, ursolic acid, and oleanolic acid. All of these compounds are reported for the first time from S. formosanum.