Lasonolide A: Structural Revision and Total Synthesis
摘要:
The proposed structure of lasonolide A was synthesized employing radical cyclization reactions of beta-alkoxyacrylates for preparation of the tetrahydropyranyl units A and B, but the spectroscopic data did not match those of the natural product. Both enantiomers of a revised structure featuring 17E,25Z double bonds were synthesized, and the (-)-isomer was found to be the biologically active enantiomer.
Lasonolide A: Structural Revision and Total Synthesis
摘要:
The proposed structure of lasonolide A was synthesized employing radical cyclization reactions of beta-alkoxyacrylates for preparation of the tetrahydropyranyl units A and B, but the spectroscopic data did not match those of the natural product. Both enantiomers of a revised structure featuring 17E,25Z double bonds were synthesized, and the (-)-isomer was found to be the biologically active enantiomer.
A Modular Synthesis of Antitumor Macrolide (–)‐Lasonolide A<sup>†</sup>
作者:Lin Yang、Zuming Lin、Kuan Zheng、Luyao Kong、Ran Hong
DOI:10.1002/cjoc.202000026
日期:2020.7
Lasonolide A was identified as a potent antitumor macrolide towards various cancer cell lines. The two tetrahydropyrans bearing multiple stereogenic centers as well as the polyene linkage attracted a dozen synthetic research groups to launch the total synthesis. Based on the synthetic methods developed in our group, namely, the hydroboration of allene and its subsequent allylation as well as the iterative
An Enantioconvergent and Concise Synthesis of Lasonolide A
作者:Lin Yang、Zuming Lin、Shunjie Shao、Qian Zhao、Ran Hong
DOI:10.1002/anie.201811093
日期:2018.12.3
several elegant syntheses of (−)‐lasonolide A having been reported, a practical synthesis of this potent anticancer polyketide remains elusive. Based on the application of borane as a traceless protecting group and the development of an unprecedented bissulfone reagent for Julia olefination, (−)‐lasonolide A was assembled in an enantioconvergent manner through the application of stereoselective hydroboration
有效获得具有药用价值的天然产品是药物开发的重要基础。海洋天然产物的有限供应妨碍了广泛的生物学评估。尽管已经报道了(-)-Lasonolide A的几种优美的合成方法,但这种有效的抗癌聚酮化合物的实用合成方法仍然难以捉摸。基于硼烷作为无痕保护基的应用以及空前的双砜试剂用于Julia烯化的发展,通过立体选择性加氢硼化,烯丙基化和氧化,以对映体收敛的方式组装了(-)-lasonolide A. 这种简洁的途径可以为访问派生词和类似物提供现实的解决方案。
Lasonolide A: Structural Revision and Synthesis of the Unnatural (−)-Enantiomer
作者:Eun Lee、Ho Young Song、Jung Won Kang、Dae-Shik Kim、Cheol-Kyu Jung、Jung Min Joo
DOI:10.1021/ja017265d
日期:2002.1.1
Total synthesis of the unnatural (-)-enantiomer of lasonolide A was achieved starting from ethyl l-malate. The two tetrahydropyranyl fragments were prepared stereoselectively via radical cyclization reactions of beta-alkoxyacrylates. The full structure of natural lasonolide A was determined unequivocally.