Total synthesis of (.+-.)-poitediol and (.+-.)4-epipoitediol
作者:Robert C. Gadwood、Renee M. Lett、Jane E. Wissinger
DOI:10.1021/ja00325a032
日期:1984.6
Synthese a partir du methyl-3 oxo-2 cyclopentane carboxylate de methyl via une bicyclo [3.2.0] heptanone-6
通过双环 [3.2.0] 庚酮-6 合成 partir dumethyl-3 oxo-2 cyclopentane carboxylate demethyl
Ring-Closing Metathesis of Allylsilanes/Electrophilic Desilylation To Prepare <i>exo</i>-Methylidenecycloalkanes. Short Syntheses of Teucladiol and Poitediol
作者:Matthew S. Dowling、Christopher D. Vanderwal
DOI:10.1021/ja906241w
日期:2009.10.28
A general strategy for the synthesis of exo-methylidenecycloalkanes, which are salient features of many terpenoid natural products, is presented. Ring-closing alkene metathesis of allylsilanes provides intermediates that can be protodesilylated with alkene transposition to afford the exocyclic alkene; alternatively, the reactivity of the cyclic allylsilane intermediate can be harnessed to introduce
Ring-Closing Metathesis of Allylsilanes As a Flexible Strategy toward Cyclic Terpenes. Short Syntheses of Teucladiol, Isoteucladiol, Poitediol, and Dactylol and an Attempted Synthesis of Caryophyllene
作者:Matthew S. Dowling、Christopher D. Vanderwal
DOI:10.1021/jo101439h
日期:2010.10.15
The development of a strategy consisting of allylsilane ring-closing metathesis and subsequent SE′ electrophilic desilylation (allylsilane RCM/SE′) to construct exo-methylidenecycloalkanes is described. Its utility is documented in short syntheses of teucladiol and poitediol. A key transformation in the synthesis of teucladiol is an aldol addition that establishes three stereochemical relationships
由烯丙基硅烷闭环复分解和随后的S E '亲电子脱甲硅烷基化反应(烯丙基硅烷RCM / S E ')构成外显子的策略的发展描述了-亚甲基亚环烷基。它的效用已在替考克二醇和聚二醇的短合成中得到了证明。替卡醇的合成中的关键转变是醛醇加成反应,它一步一步建立了三种立体化学关系,非对映选择性≥10:1,并且在天然产物合成的背景下,外消旋反应伙伴提供了一个立体立体分化/动力学拆分的双重引人入胜的例子。从环戊烯酮开始合成(±)-戊二醇需要5个步骤,总产率为28%;通过该途径对(-)-戊二醇的对映选择性合成的适应性能够确定该萜烯天然产物的绝对构型。在最后的甲硅烷基化步骤中使用氟化物介导的条件可以保留烯烃的位置,提供天然产物(±)-异戊二醇(五个步骤,环戊烯酮的收率为21%)。聚乙二醇的合成显示了RCM可以构建八元环,并具有高度非对映选择性的环氧化/氟化物介导的片段化序列,可用于安装外亚甲基与相邻的带有羟基
Stereoelectronic effects in cyclo-octanes: synthesis of (±)-dactylol and (±)-isodactylol
作者:Robert C. Gadwood
DOI:10.1039/c39850000123
日期:——
Racemic dactylol and isodactylol were synthesized from racemic poitediol and 4-epipoitediol respectively.
由外消旋聚二醇和4-表戊二醇分别合成外消旋己内酯和异己内酯。
Total synthesis of (.+-.)-poitediol and (.+-.)-dactylol
作者:Robert C. Gadwood、Renee M. Lett、Jane E. Wissinger