A new organocatalyst-based method reported by researchers at Shanghai Jiao Tong University offers a catalytic way to control phosphorus stereochemistry when synthesizing phosphorothioate oligonucleotides and cyclic dinucleotides. The work combines a catalyst-controlled nucleoside-loading step with stereospecific coupling under mild, redox-neutral conditions. It is a synthetic chemistry advance—not evidence that medicines are already cheaper, more effective, or ready for commercial-scale production.
What the organocatalyst does
Oligonucleotides are short chains of nucleotides, and their chemical backbones can be modified to create molecules with useful therapeutic properties. In phosphorothioate oligonucleotides, sulfur replaces one of the backbone’s oxygen atoms. That substitution creates a phosphorus stereocenter: the atoms around phosphorus can be arranged in different three-dimensional configurations, which may affect biological activity.
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Fang and colleagues report multifunctional chiral bis(amidine) organocatalysts that help direct this stereochemistry. Their method uses catalyst-controlled nucleoside loading followed by stereospecific coupling. The catalyst is not described as controlling every iterative assembly step; rather, the strategy combines a controlled loading step with subsequent selective bond formation. The authors report that the approach can produce stereodefined phosphorothioate oligonucleotides and cyclic dinucleotides. Nature Catalysis
How it differs from auxiliary-based control
Some established stereocontrol strategies use a chiral auxiliary—a temporary stereochemistry-directing group that must be attached and later removed. The paper describes these approaches as requiring multiple installation and removal operations. In the reported method, the catalyst supplies stereochemical control during nucleoside loading and coupling, avoiding that auxiliary installation-and-removal sequence.
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This is a difference in synthetic design, not a demonstrated cost or speed comparison. The available reports do not establish that the catalytic route is cheaper, higher-yielding, or faster in production than auxiliary-based methods.
What chemistry and workflows were demonstrated
The primary paper reports formation of phosphorus–oxygen, phosphorus–sulfur, phosphorus–carbon, and phosphorus–nitrogen linkages, as well as stereocontrolled synthesis in both 5′→3′ and 3′→5′ solid-phase workflows. Chemistry World reports demonstrations across more than 20 nucleoside combinations and says the chemistry was adapted for automated solid-phase synthesis. These are research demonstrations, not evidence of validated commercial manufacturing performance. Chemistry World
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Why phosphorus stereochemistry matters
Phosphorothioate oligonucleotides and cyclic dinucleotides are therapeutically important molecular classes, and the primary paper identifies phosphorus stereochemistry as important to their activity. If different configurations behave differently, the ability to prepare stereodefined molecules can help researchers investigate which structures produce desired biological effects.
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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →That research opportunity should not be confused with a proven therapeutic advantage. The sources do not report that this catalyst improves patient outcomes or that it has been used to improve an approved drug. Shang described the goal as determining whether stereopure oligonucleotide medicines can offer meaningful advantages over current stereoisomeric mixtures.
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What the study does not establish
- Clinical benefit: No improvement in patient outcomes or drug efficacy is demonstrated by the synthesis study.
- Commercial-scale production: Adaptation to automated solid-phase synthesis does not establish manufacturing performance at commercial scale.
- Cost or yield advantage: The reports do not provide a validated comparison showing lower costs, higher yields, or faster production.
- Regulatory acceptance: The sources do not establish regulatory approval or acceptance of products made with this method.
The most defensible conclusion is that the work presents a potentially simpler catalytic strategy for making stereodefined oligonucleotide-related compounds. Whether it translates into manufacturing or medical advantages remains an open question. Nature Catalysis News & Views
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- Package includes five setsthe package list includes 5 x set of dna teaching model, providing multiple units for classroom rotation, group activities, or shared learning environments
- Package includes five setsthe package list includes 5 x set of dna teaching model, providing multiple units for classroom rotation, group activities, or shared learning environments
- Package includes five setsthe package list includes 5 x set of dna teaching model, providing multiple units for classroom rotation, group activities, or shared learning environments
- Package includes five setsthe package list includes 5 x set of dna teaching model, providing multiple units for classroom rotation, group activities, or shared learning environments
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