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Related Concept Videos

Dehydration Synthesis01:15

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Overview
Dehydration synthesis (also called a condensation reaction) is the chemical process in which two molecules covalently link together to form a new molecule, along with the release of a water molecule. Many physiologically important compounds form by dehydration synthesis reactions, such as complex carbohydrates, proteins, DNA, and RNA.
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During replication, the complementary strands in double-stranded DNA are synthesized at different rates. Replication first begins on the leading strand. Replication starts later, occurs more slowly, and proceeds discontinuously on the lagging strand.
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Transfer RNA Synthesis02:36

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One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases.
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meta-Directing Deactivators: –NO2, –CN, –CHO, –⁠CO2R, –COR, –CO2H01:13

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All meta-directing substituents are deactivating groups. These substituents withdraw electrons from the aromatic ring, making the ring less reactive toward electrophilic substitution. For example, the nitration of nitrobenzene is 100,000 times slower than that of benzene because of the deactivating effect of the nitro group. The first step in an electrophilic aromatic substitution is the addition of an electrophile to form a resonance-stabilized carbocation. The energy diagrams for...
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Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

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Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
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Synthesis of a Deuterated Standard for the Quantification of 2-Arachidonoylglycerol in Caenorhabditis elegans
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Methods for 2-Deoxyglycoside Synthesis.

Clay S Bennett1, M Carmen Galan2

  • 1Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , Massachusetts 02155 , United States.

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|June 29, 2018
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Summary
This summary is machine-generated.

Synthesizing deoxy-sugars is key for creating potent bioactive natural products. This review explores new and classical glycosylation methods for making deoxyglycosides with controlled selectivity.

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Area of Science:

  • Organic Chemistry
  • Synthetic Chemistry
  • Natural Product Synthesis

Background:

  • Deoxy-sugars are crucial components of many bioactive natural products, influencing their potency.
  • The synthesis of deoxy-sugars and their derivatives, deoxyglycosides, has been a significant area of research.
  • Developing efficient and selective methods for deoxyglycoside construction is essential for accessing complex natural products.

Purpose of the Study:

  • To review classical and modern synthetic methodologies for deoxyglycoside formation.
  • To highlight recent advancements in glycosylation reactions offering improved selectivity.
  • To discuss the application of these synthetic methods in the context of natural product synthesis.

Main Methods:

  • Review of established glycosylation reactions for deoxy-sugar synthesis.
  • Analysis of novel chemical strategies employing promoter design for enhanced selectivity.
  • Examination of case studies demonstrating the utility in total synthesis of natural products.

Main Results:

  • Classical methods provide foundational approaches to deoxyglycoside synthesis.
  • Recent developments focus on rational promoter design to achieve high reaction selectivity.
  • The described methodologies are applicable to the synthesis of diverse bioactive natural products.

Conclusions:

  • Advances in glycosylation chemistry have significantly improved the synthesis of deoxyglycosides.
  • Controlling selectivity through promoter design is a key trend in modern deoxy-sugar synthesis.
  • These synthetic advancements facilitate the exploration and production of valuable natural products.