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Related Concept Videos

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

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Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
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Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
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Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids02:04

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Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
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Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
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Such genes that act...
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Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

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Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
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Development of anticancer agents: wizardry with osmium.

Muhammad Hanif1, Maria V Babak1, Christian G Hartinger1

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Novel osmium compounds show significant potential as anticancer drugs, offering an alternative to platinum-based chemotherapy. These agents exhibit potent cancer cell growth inhibition and in vivo activity, with diverse mechanisms of action.

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Area of Science:

  • Medicinal Chemistry
  • Oncology
  • Inorganic Chemistry

Background:

  • Platinum compounds like cisplatin are mainstays in cancer chemotherapy but have limitations.
  • Development of novel anticancer agents with alternative mechanisms is crucial.
  • Osmium (Os) complexes are emerging as promising metal-based anticancer drugs.

Purpose of the Study:

  • To review recent advancements in osmium-based anticancer drug development.
  • To discuss the cellular mechanisms of action for osmium anticancer candidates.

Main Methods:

  • Literature review of recent studies on osmium anticancer compounds.
  • Analysis of in vitro and in vivo data for osmium drug candidates.
  • Examination of diverse cellular mechanisms, including redox activation, DNA targeting, and kinase inhibition.

Main Results:

  • Osmium complexes demonstrate potent inhibition of human cancer cell growth.
  • In vivo activity of osmium compounds is often comparable or superior to cisplatin.
  • Osmium compounds display varied mechanisms of action based on ligand design.

Conclusions:

  • Osmium compounds represent a promising class of novel anticancer agents.
  • Their efficacy and diverse mechanisms offer alternatives to current chemotherapeutics.
  • Further research into osmium-based drugs holds significant therapeutic potential.