Dynemicin A, Uncialamycin and Analogues by Daniel Best, Mickael Jean, Pierre Van De Weghe

By Daniel Best, Mickael Jean, Pierre Van De Weghe

Enediynes are average items with hugely lively cytotoxicity and antibacterial job, and therefore have major strength within the improvement of anti-cancer treatments.  besides the fact that, they aren't available and will degrade swiftly in the course of isolation; one resolution is to provide them utilizing overall synthesis. Dynemicin A and uncialamycin are such enediynes, with related buildings, for which overall synthesis has been achieved.  This booklet offers the isolation and instruction of those compounds and their analogues via a variety of synthesis options. information of the structural components necessary to their anti-cancer task are provided, with the target of explaining and optimizing their organic actions and strength improvement as drugs.

  • Presents typical ènediynes with related constructions whose overall syntheses were accomplished
  • Explores structural analogs of guidance for reasons of optimizing the anti-cancer activity
  • Describes the entire syntheses of dynemicin A, the uncialamycine, in addition to analogs via emphasizing the synthesis concepts adopted
  • Features stories of the organic actions and information to deliver out the structural components of those crucial compounds

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Additional resources for Dynemicin A, Uncialamycin and Analogues

Sample text

Following benzyl protection, acetal hydrolysis of 2-202 with a concomitant Friedel–Crafts cyclization provided a ~4:1 mixture of regioisomeric quinolinones, where the major isomer 2-203 had arisen from reaction at the less hindered position of the aromatic ring. Reduction of the amide gave dihydroquinoline 2-204, which was slurred with silica gel under air to promote oxidation to quinoline 2-205. 25), and catalytic hydrogenolysis provided 7-hydroxyquinoline 2-207. From here, investigations proceeded with two types of protecting groups: pivaloyl (Piv, compound 2-208), which shows lability under intracellular conditions, and o-nitro benzyl (o-NB, compound 2-209), which is photolabile and allows deprotection of delicate downstream intermediates under mild conditions.

17) was presumed to be a consequence of high epoxide lability, which then triggers Bergman cyclization and potentially cytotoxic activity. g. g. 2-108 and 2-126) can be regenerated by reduction in the cytosol of (often hypoxic) cancer cells [SHA 94b, DAN 96b]. Intermediate 2-96 was acetylated and desylilated to form the unstable enediyne 2-126, which is immediately oxidized with PhI(OAc)2 to allow purification and isolation of the stabilized quinone imine 2-127. 1) and led to significant reduction of tumor size in mice with better performance than the chemotherapy drug mitomycin C 2-143.

The synthesis was carried out in two phases: 1) a proof of principle demonstration of Bergman cyclization under acidic conditions with an analogue featuring a stable carbamate group and 2) introduction of a photocleavable group R to the analogues, allowing triggering of epoxide hydrolysis and cycloaromatization under mild conditions. 11. Wender’s dynemicin A 2-1 analogues. 2. 38 [WEN 91]. First the aldehyde function in the commercially available quinoline 2-253 was reduced, and Yamaguchi reaction with trimethylsilylacetylene in the presence of methyl chloroformate introduced the first alkyne unit of the enediyne 2-254.

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