描述了 callipeltoside A 的对映选择性全合成。包括大环内酯亚基的两种合成:第一种依赖于爱尔兰-克莱森重排来产生三取代的烯烃几何结构,第二种利用对映选择性插烯羟醛反应来实现此目的。还公开了糖和氯代环丙烷侧链片段的对映选择性合成。该天然产物的相对和绝对立体化学通过与侧链片段的两种对映异构体的片段偶联来确定。
Callipeltoside A: Total Synthesis, Assignment of the Absolute and Relative Configuration, and Evaluation of Synthetic Analogues
作者:Barry M. Trost、Janet L. Gunzner、Olivier Dirat、Young H. Rhee
DOI:10.1021/ja0205232
日期:2002.9.1
alkylation (AAA). The novelty of the latter protocol is its control of regioselectivity as well as absolute configuration. The trisubstituted olefin is generated using an alkene-alkyne coupling to create a trisubustituted olefin with complete control of geometry. The excellent chemo- and regioselectivity highlights the synthetic potential of this new ruthenium catalyzed process. The macrolactonization employs
Enantioselective total synthesis of callipeltoside A: two approaches to the macrolactone fragment
作者:David A. Evans、Jason D. Burch、Essa Hu、Georg Jaeschke
DOI:10.1016/j.tet.2008.02.001
日期:2008.5
The enantioselectivetotalsynthesis of callipeltoside A is described. Two syntheses of the macrolactone subunit are included: the first relies upon an Ireland-Claisen rearrangement to generate the trisubstituted olefin geometry and the second utilizes an enantioselective vinylogous aldol reaction for this purpose. Enantioselective syntheses of the sugar and chlorocyclopropane side chain fragments
描述了 callipeltoside A 的对映选择性全合成。包括大环内酯亚基的两种合成:第一种依赖于爱尔兰-克莱森重排来产生三取代的烯烃几何结构,第二种利用对映选择性插烯羟醛反应来实现此目的。还公开了糖和氯代环丙烷侧链片段的对映选择性合成。该天然产物的相对和绝对立体化学通过与侧链片段的两种对映异构体的片段偶联来确定。
Convergent Total Syntheses of Callipeltosides A, B, and C
作者:James R. Frost、Colin M. Pearson、Thomas N. Snaddon、Richard A. Booth、Steven V. Ley
DOI:10.1002/anie.201204868
日期:2012.9.10
diastereoselective alkenylzinc addition allowing rapid access to the common aglycon. Attachment of each relevant L‐configured sugar resulted in the first total synthesis of callipeltoside B (see scheme), and the syntheses of callipeltosides A and C.
A convergent totalsynthesis of cytotoxic marine macrolide callipeltoside A is described. The synthesis highlights two stereoselective [4 + 2] annulations for the preparation of associated pyran rings.
Asymmetric Synthesis of the Chlorocyclopropane-Containing Callipeltoside A Side Chain
作者:David A. Evans、Jason D. Burch
DOI:10.1021/ol0155182
日期:2001.2.1
[GRAPHICS]The callipeltoside A chlorocyclopropyl-containing dienyne side chain has been synthesized in nine steps and 33% overall yield from commercially available 1,2,5,6-O-dicyclohexylidene-D-mannitol. The key steps in the synthesis are a highly diastereoselective cyclopropanation of a vinyl chloride allylic ether and a Suzuki cross-coupling to complete the carbon framework.