Total synthesis of the potent mutagen S-3-(dodeca-1,3,5,7,9-pentaenyloxy)propane-1,2-diol
作者:K. C. Nicolaou、Robert Zipkin、David Tanner
DOI:10.1039/c39840000349
日期:——
A totalsynthesis of the mutagenic (S)-3-(dodeca-1,3,5,7,9-pentaenyloxy)propane-1,2-diol (1) from (R)-glycerol acetonide (2), potassium glutaconate (6), and the diphenylphosphine oxide (11) is reported.
Syntheses of Strychnine, Norfluorocurarine, Dehydrodesacetylretuline, and Valparicine Enabled by Intramolecular Cycloadditions of Zincke Aldehydes
作者:David B. C. Martin、Lucas Q. Nguyen、Christopher D. Vanderwal
DOI:10.1021/jo2020246
日期:2012.1.6
base-mediated intramolecular Diels–Alder cycloadditions of tryptamine-derived Zincke aldehydes is described. This important complexity-generating transformation provides the tetracyclic core of many indole monoterpene alkaloids in only three steps from commercially available starting materials and played a key role in short syntheses of norfluorocurarine (five steps), dehydrodesacetylretuline (six steps), valparicine
A Modular, Enantioselective Synthesis of Resolvins D3, E1, and Hybrids
作者:Felix Urbitsch、Bryony L. Elbert、Josep Llaveria、Penelope E. Streatfeild、Edward A. Anderson
DOI:10.1021/acs.orglett.0c00089
日期:2020.2.21
Here, we report a convergent and flexible strategy to prepare these naturalproducts using Hiyama-Denmark coupling of five- and six-membered cyclic alkenylsiloxanes to connect three resolvin fragments, and control the stereochemistry of the naturalproduct (Z)-alkenes. The modular nature of this approach enables the synthesis of novel resolvin hybrids, opening up opportunities for more-extensive investigations
Palladium catalyzed cross-coupling reactions of (2E,4E)-5-bromo-2,4-pentadienal 1 with organozinc reagents gives an easy access to the corresponding (2E,4E)-2,4-dienals. The improved preparation of all trans 1 by isomerization of its (2E,4Z) isomer is reported.
A sequential cycloaddition strategy for the synthesis of Alsmaphorazine B traces a path through a family of Alstonia alkaloids
作者:Allen Y. Hong、Christopher D. Vanderwal
DOI:10.1016/j.tet.2016.11.004
日期:2017.7
Driven by a new biogenetic hypothesis, the first totalsynthesis of alsmaphorazine B and several related indolealkaloids has been achieved. Numerous early approaches proved unsuccessful owing to unproductive side reactivity; nevertheless, they provided important clues that guided the evolution of our strategy. Critical to our success was a major improvement in our Zincke aldehyde cycloaddition strategy
在新的生物遗传学假说的推动下,首次实现了阿司马佛嗪 B 和几种相关吲哚生物碱的全合成。由于副反应性低下,许多早期方法被证明是不成功的。尽管如此,它们还是提供了指导我们战略演变的重要线索。我们成功的关键是我们的 Zincke 醛环加成策略的重大改进,该策略允许高效地克级规模合成 akuammicine。akuammicine 的连续化学选择性氧化导致关键的氧化重排,在生成阿司马佛嗪 B的过程中也产生了几种生物遗传学相关的吲哚生物碱。