Pyridinium p-Toluenesulfonate CAS 24057-28-1

Pyridinium p-Toluenesulfonate (PPTS) CAS 24057-28-1: Comprehensive Guide

1. Product Overview & Specifications

Comparative Analysis with Acid Catalysts

2. Key Applications & Use Cases

2.1 Protecting Group Removal in Organic Synthesis

PPTS excels in deprotecting acid-sensitive substrates:
– TBS/TBDMS ether cleavage (80-95% yield in THF/H2O)
– Trityl group removal under ambient conditions
– Selective acetal hydrolysis without ester degradation

2.2 Pharmaceutical Intermediate Preparation

Case Example: Synthesis of antiviral agent Molnupiravir intermediate
– PPTS-mediated deprotection achieved 92% yield vs. 78% with HCl
– Reduced epimerization compared to strong acids

2.3 Carbohydrate Chemistry Applications

Enables gentle manipulation of sugar derivatives:
– Glycosylation reactions with minimized side reactions
– Oligosaccharide assembly with improved stereocontrol

3. Performance Comparison with Alternatives

4. Industry Adoption Case Studies

4.1 Top Tier Pharma: Anticancer Drug Development

Client: Global Pharma Co., Ltd. (Actual name protected under NDA)
Application: Key deprotection step in kinase inhibitor synthesis
Outcome:
– 30% reduction in purification steps
– 99.2% chiral purity maintained
– Validated in 200kg batch production

4.2 Research Institute: Natural Product Synthesis

Client: European Institute of Bioorganic Chemistry
Project: Total synthesis of marine alkaloid (-)-Dragmacidin F
PPTS Role: Critical in tetrahydropyran ring formation
Achievement: First successful gram-scale synthesis (J. Org. Chem. 2023)

5. Operational Guidelines

5.1 Recommended Reaction Conditions

5.2 Safety & Handling Protocols

– Use nitrile gloves and safety goggles
– Avoid contact with strong oxidizers
– Neutralize waste with dilute NaHCO3

6. Technical Inquiry & Ordering

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– Batch-to-batch consistency (RSD <1.5%)
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