【作者】 权伟国；

【导师】 潘鑫复； 厍学功；

【作者基本信息】 兰州大学 ， 有机化学， 2007， 博士

【摘要】 本文完成了四个天然产物、六个天然产物异构体及四个天然产物前体的全合成研究，其中两个天然产物为首次全合成。共包括以下五个部分：一、Prins环化反应的研究进展(综述)综述了近年来Prins成环反应的一些新的研究进展，以及其在天然产物全合成中的应用。二、二氢异香豆素类化合物的全合成研究简要介绍了二氢异香豆素类天然产物的相关生理活性，及合成研究报道。并以4-丁基-3，5-二甲氧基苯甲醛为起始原料，用Sharpless不对称双羟化反应作为关键步骤，合成了手性的7-butyl-6，8-dihydroxy-3(R)-pentylisochroman-1-one(2-9)。又用一条新的路线成功的完成了7-Butyl-6，8-dihydroxy-3-pent-11-enylisochroman-1-one((±)2-lO)的消旋体的合成。三、(一)-Heliconol A的首次全合成研究简要介绍了Heliconol A类天然产物的相关生理活性。以2-(苄氧基甲基)环戊烯酮为起始原料，以CBS不对称还原为关键步骤，通过两次诱导的高选择性双羟化反应等步骤完成了(一)-Heliconol A(3-1)及它的一个异构体(3-18)的首次全合成。四、两个kawain类天然产物全合成研究简要介绍了kawain类天然产物的生理活性，及合成研究报道。以醛和手性丙二烯硼酸酯的加成反应为关键步骤，完成了(+)-Dihydrokawain(4-1a)和(+)-Dihydrokawain-5-ol(4-2a)在内的所有对映体(4-1b，4-2b，4-3a和4-3b)的合成。五、脱碳木脂素的手性全合成研究简要介绍了脱碳木脂素类天然产物的分布及相关生理活性及合成研究报道。并设计了以(S，S)-1，4-二苄氧基-2，3-环氧丁烷为起始原料，成功地合成了Agatharesino(5-1b)和Sugirresinol(5-2b)二甲醚化合物，首次合成了Nyasol(5-4b)的二甲醚及Tetrahydronysol(5-5)，并且验证了它们的立体结构。更多还原

【Abstract】 This thesis main focused on the total syntheses of several natural products. Include thefollowing five parts:Chapter 1. The recent progress on the study of the Prins Cyclization (review)The review introduced some methods on recently study of the Prins Cyclization, and which were applied in the synthesis of natural products.Chapter 2. The first total synthesis of 7-butyl-6, 8-dihydroxy-3(R)-pentylisochroman -1-oneThe definition, classification of isochroman comounds, and previous synthetic reports of them were introduced briefly. A novel approach has been found and the first total synthesis of 7-butyl-6,8-dihydroxy-3(R)-pentylisochroman-l-one was accomplished. In which Sharpless asymmetric dihydroxylation was the key stepChapter 3. The first total synthesis of (-)-Heliconol A and its diastereoisomerThe definition of heliconol A compounds were introduced in brief. A facile total synthesis of the (-)-Heliconol A as well as its diastereoisomer is described, in which different reaction sequences lead to different results. If osmylation followed hydrolysis afforded a single isomer, otherwise, afforded a mixture of (-)-Heliconol A and its diastereoisomer 3-18. Other important processes include the catalytic asymmetric CBS reduction and induced highly stereoselective osmylation.Chapter 4. Enantioselective synthesis of all stereoisomers of Dihydrokawain and Dihydrokawain-5-olThe activity of Dihydrokawain and Dihydrokawain-5-ol were introduced and previous synthetic reports of them were introduced in brief. The enantioselective synthesis of all stereoisomers of Dihydrokawain and Dihydrokawain-5-ol was shortly achieved from readily available allenylboronic esters, in which condensations of aldehydes with chiral allenylboronic esters as the key step.Chapter 5. A facile approach to synthesis of the di-O-methyl ethers of (-)-agatharesinol, (-)-sugiresinol, (+)-nyasol and (+)-tetrahydronyasolThe activity of (-)-agatharesinol, (-)-sugiresinol were introduced and previous synthetic reports of them were introduced in brief. The facile enantioselective synthesis of the di-O-methyl ethers of (-)-agatharesinol, (-)-sugiresionl, (+)-nyasol and (+)-tetrahydronyasol were achieved in high yield. The absolute configuration of (+)-nyasol was confirmed via first total synthesis of (+)-nyasol and (+)-tetrahydronyasol.更多还原