题名天然产物Standishinal 的首次全合成研究; Studies on the First Total Synthesis of Standishinal
作者杨平
学位类别硕士
答辩日期2006-05-01
导师张国林
关键词Standishinal 三环二萜 芳香化酶抑制剂 Friedel-Crafts 反应 Standishinal tricyclic-diterpene aromatase inhibitor Friedel-Crafts reaction
其他题名Studies on the First Total Synthesis of Standishinal
中文摘要具有1,1,4α-三甲基氢化芴骨架结构的天然三环二萜化合物自然界中不常见。在该类化合物中,Standishinal 具有良好的芳香化酶抑制活性和细胞毒活性。迄今未发现有Standishinal 的全合成报道,因此,我们对Standishinal 的全合成进行了探索,在该过程中得到以下实验结果: 1. 发现MSA/P2O5、MSA 在无溶剂条件下,25 °C 时烷氧基苯即可实现向苯酚的转化,但在CH3NO2 中,温度升高至80 °C 并未发生反应。 2. 烷氧基苯或对溴苯酚与α-环香叶酸在不同温度下以MSA/P2O5、MSA、PPA为催化剂以CH3NO2 为溶剂或以BF3·Et2O为催化剂时均不发生Friedel-Crafts酰化反应。 3. 对溴苯酚与香叶酸在p-TsOH 催化作用下发生了香叶酸向α-环香叶酸环化、α-环香叶酸环与对溴苯酚的酯化,得到了唯一产物α-环香叶酸对溴苯酯,产率68%。 Standishinal is one of tricyclic-diterpenes possessing the uncommon 1, 1,4a-trimethylhydrofluorene skeleton. Standishinal possesses cytotoxic and aromataseinhibitory activities. Till now, no synthesis of standishinal has been reported. Inattempt to synthesize standishinal, the following phenomenon were observed: 1. Alkyloxybenzenes could be transformed into corresponding phenol at 25 °C inthe presence of MSA/P2O5 or MSA under solvent free condition. ButAlkyloxybenzenes are stable in presence of MSA/P2O5 or MSA in CH3NO2 even at 80 °C. 2. Friedel-Crafts acylation of alkyloxybenzenes and p-bromophenol withα-cyclogeranic acid could not be realized under catalysis of MSA/P2O5, MSA or PPAin CH3NO2, or under catalysis of BF3·Et2O without CH3NO2. 3. The reaction of 4-bromaophenol and geranic acid in the presecnce of p-TsOHafforded 4-bromophenol α-cyclogeranoate in which cyclization of geranic acid toα-cyclogeranic acid was followed by esterification of α-cyclogeranic acid with p-bromophenol.
语种中文
学科主题植物学
公开日期2011-03-31 ; 2011-05-18
页码99
内容类型学位论文
源URL[http://210.75.237.14/handle/351003/2407]  
专题成都生物研究所_天然产物研究
推荐引用方式
GB/T 7714
杨平. 天然产物Standishinal 的首次全合成研究, Studies on the First Total Synthesis of Standishinal[D]. 2006.
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