A Synthesis of the Chlorosulfolipid Mytilipin A via a Longest Linear Sequence of Seven Steps
作者:Won-jin Chung、Joseph S. Carlson、D. Karl Bedke、Christopher D. Vanderwal
DOI:10.1002/anie.201304565
日期:2013.9.16
Magnificent seven: The chlorosulfolipidmytilipin A was synthesized in racemic form in sevensteps and in enantioenriched form in eight steps. Key transformations include a highly diastereoselective bromoallylation of a sensitive α,β‐dichloroaldehyde, a kinetic resolution of a vinyl epoxide, a convergent and highly Z‐selective alkene cross‐metathesis, and a chemoselective and diastereoselective dichlorination
精彩七:氯硫脂 mytilipin A 以外消旋形式分七步合成,对映体富集形式分八步合成。关键转化包括敏感的 α,β-二氯醛的高度非对映选择性溴烯丙基化、乙烯基环氧化物的动力学拆分、会聚和高度Z选择性烯烃交叉复分解,以及复合二烯的化学选择性和非对映选择性二氯化。
Asymmetric Total Synthesis of (+)-Hexachlorosulfolipid, a Cytotoxin Isolated from Adriatic Mussels
The enantioselective total synthesis of (+)-hexachlorosulfolipid, a cytotoxin found in the Adriatic mussel Mytilus galloprovincialis, is described. The unique chlorinated hydrocarbon motif of the lipid is successfully furnished by a series of dichlorination reactions of chiral epoxides with chlorophosphonium reagent generated in situ from Ph3P/NCS. The present total synthesis has allowed the confirmation
描述了(+)-六氯磺脂的对映选择性全合成,这是一种在亚得里亚海贻贝Mytilus galloprovincialis中发现的细胞毒素。通过手性环氧化物与从Ph 3 P / NCS原位生成的氯phosph试剂的一系列二氯化反应,成功地提供了脂质独特的氯化烃基序。目前的总合成已经证实了最初由Fattorusso,Ciminiello和同事提出的天然细胞毒性(+)-六氯磺脂的绝对构型。
Total synthesis of a chlorosulpholipid cytotoxin associated with seafood poisoning
作者:Christian Nilewski、Roger W. Geisser、Erick M. Carreira
DOI:10.1038/nature07734
日期:2009.1
efficient routes to their synthesis would be desirable for the preparation of material for pharmacological characterization and proper evaluation of the risk to human health. Despite the notable advances in the science of organic synthesis, reliable methods for stereoselective construction of polychlorinated acyclic substrates are lacking, although some preliminary investigations have appeared. Here we report
Structural Elucidation of a New Cytotoxin Isolated from Mussels of the Adriatic Sea
作者:Patrizia Ciminiello、Ernesto Fattorusso、Martino Forino、Massimo Di Rosa、Angela Ianaro、Roberto Poletti
DOI:10.1021/jo001437s
日期:2001.1.1
A detailed analysis of the toxic composition in the hepatopancreas of mussels from northern Adriatic sea has been performed. Along with some polyether toxins of DSP (diarrhetic shellfish poisoning) type, such as yessotoxin and its analogues, which are responsible for a variety of human seafood poisonings throughout the world, we have now isolated a new type of toxin, the chlorosulfolipid 1, which is completely different in structure from the polyether DSP-toxins isolated so far. The structural determination of the new toxin, including its absolute stereochemistry, has been performed by extensive NMR analysis and molecular mechanics and dynamics calculations.
General Approach to the Synthesis of the Chlorosulfolipids Danicalipin A, Mytilipin A, and Malhamensilipin A in Enantioenriched Form
作者:Won-jin Chung、Joseph S. Carlson、Christopher D. Vanderwal
DOI:10.1021/jo5000829
日期:2014.3.7
A second-generation synthesis of three structurally related chlorosulfolipids has been developed. Key advances include highly stereocontrolled additions to α,β-dichloroaldehydes, kinetic resolutions of complex chlorinated vinyl epoxide intermediates, and Z-selective alkene cross metatheses of cis-vinyl epoxides. This strategy facilitated the synthesis of enantioenriched danicalipin A, mytilipin A,
已开发出三种结构相关的氯硫脂的第二代合成方法。主要进展包括对 α,β-二氯醛的高度立体控制添加、复杂氯化乙烯基环氧化物中间体的动力学分辨率以及顺式乙烯基环氧化物的Z-选择性烯烃交叉复分解。该策略分别通过 9、8 和 11 个步骤促进了对映体富集的 danicalipin A、mytilipin A 和 malhamensilipin A 的合成。