Merck, M061040-1G, Phosphate-ON Phosphoramidite

General description
Phosphate-ON phosphoramidite is a chemical phosphorylation reagent that can be employed to introduce a phosphate group at the 5′ terminus of an oligonucleotide. Chemical phosphorylation is a cost-effective alternative to enzymatic phosphorylation methods, allowing the introduction of terminal phosphate groups in high yields, at any desired scale. We offer Phosphate-ON phosphoramidite in powder form, enabling the dissolution of the reagent in acetonitrile to be easily monitored.
Application
The application of Phosphate-ON Phosphoramidite is fully compatible with standard cleavage and deprotection procedures at the end of oligonucleotide synthesis. Phosphate-ON phosphoramidite comprises a thymidine nucleoside, which is removed from the oligonucleotide during the cleavage and deprotection process.
Other Notes
The key features of Phosphate-ON Phosphoramidite are as follows:

• Powder format enables dissolution to be easily monitored and facilitatesproduct handling
• Fully compatible with standard phosphoramidite reagents and synthesisconditions
• Compatible with dG(dmf) fast deprotection chemistry: the oligonucleotidecan be cleaved from the support and deprotected in concentratedammonia at 55 °C in only 2 hours
• Comprises a DMT-group for trityl monitoring
• Dissolves easily in acetonitrile to a 0.1 M solution
• High coupling efficiency of ≥98.0% under standard DNA phosphoramiditecoupling conditions
• Cleavage of both phosphate protective groups through a β-eliminationprocess

Legal Information
This product is covered under US Patent Number 7,276,598