Chuktabularins A-D, Four New Limonoids with Unprecedented Carbon Skeletons from the Stem Bark of Chukrasia tabularis

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• 作者：Chuan-Rui Zhang ; Sheng-Ping Yang ; Shang-Gao Liao ; Cheng-Qi Fan ; Yan Wu ; Jian-Min Yue
• 刊名：Organic Letters
• 出版年：2007
• 出版时间：August 16, 2007
• 年：2007
• 卷：9
• 期：17
• 页码：3383 - 3386
• 全文大小：145K
• 年卷期：v.9,no.17(August 16, 2007)
• ISSN：1523-7052

文摘

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Chuktabularins A-D (1-4), four novel 16-norphragmalin-type limonoids that feature unprecedented skeletons with a biosynthetically extendedC2 or C3 unit at C-15 forming a unique 2,7-dioxabicyclo[2.2.1]heptane moiety, were isolated from the stem bark of Chukrasia tabularis. Theirstructures were elucidated by spectroscopic analysis and computer modeling. The biosynthetic pathway of 1-4 was postulated.