3'-NH-Trt-2',3'-ddG (iBu) 5'-CE Phosphoramidite
Oligonucleotide Synthesis, RNA Raw Materials & Modification
Product summary
Quick view
- Product family
- Oligonucleotide Synthesis, RNA Raw Materials & Modification
- MF
- C42H51N8O5P
- MW
- 778.9
- Purity
- 99%
3'-NH-Trt-2',3'-ddG (iBu) 5'-CE Phosphoramidite is a building block for N3'→P5' phosphoramidate oligonucleotide chemistry: a 3'-tritylamino-2',3'-dideoxyguanosine with N2-isobutyryl protection and a 5'-O-(2-cyanoethyl N,N-diisopropyl)phosphoramidite. Its PubChem-backed identity includes CAS 195375-66-7, molecular formula C42H51N8O5P, molecular weight 778.9, PubChem CID 135506969, and InChIKey USNNKXWWDUBLFP-MICLYWDSSA-N.
Unlike a standard amidite, the 3'-position carries a trityl-protected primary amine in place of the 3'-hydroxyl, and the phosphoramidite is on the 5'-position as a reverse amidite. During synthesis, the incoming monomer's 5'-phosphoramidite couples to the 3'-amino group of the growing chain, forming a P-N phosphoramidate bond (an N3'→P5' linkage) instead of the natural phosphodiester. Cited phosphoramidate literature reports nuclease-hydrolysis, duplex-stability, and RNA-like C3'-endo conformation context for this backbone class. N2-isobutyryl protects the guanine amine and is removed during final deprotection.
Synonyms
3'-amino-3'-deoxy-2'-deoxyguanosine(iBu) 5'-CE phosphoramidite, 3'-N-trityl; N3'->P5' phosphoramidate G building block
Identity and specifications
| Catalog No. | CH65126 |
| CAS No. | 195375-66-7 |
| Molecular Formula | C42H51N8O5P |
| Molecular Weight | 778.9 |
| PubChem CID | 135506969 |
| InChIKey | USNNKXWWDUBLFP-MICLYWDSSA-N |
| Purity | 99% |
Storage conditions
-20 C
Technical attributes
- Monomer class
- 3'-NH-Trt reverse CE phosphoramidite
- Nucleobase
- Guanine
- Base protection
- N2-isobutyryl
- Linkage role
- N3'-to-P5' phosphoramidate
- Grade
- N (Normal)
- Packaging
- 10 mg; 50 mg; 100 mg; 250 mg; 1 g; 5 g; 10 g; 25 g; 50 g; 100 g; 500 g; 1 kg; 5 kg; 20 kg; 25 kg; Custom packaging on request
- Physical form
- solid
- Stability
- powder: 3 years; in solvent: 1 year
Application context
- N3'→P5' phosphoramidate linkage: the 3'-amino group couples to the next residue's 5'-phosphorus, forming a P-N phosphoramidate bond in place of a phosphodiester.
- Reverse (5'-)amidite: the phosphoramidite is on the 5'-position and the 3'-amine is trityl-protected, so chain assembly runs in the 5'→3' sense for this chemistry.
- Backbone literature context: cited N3'→P5' phosphoramidate literature reports nuclease-hydrolysis, duplex-stability, and RNA-like C3'-endo conformation context; N2-isobutyryl protects the guanine amine.
Related technical resources
Oligonucleotide Modification
Sugar, base, backbone, terminal, and conjugation modifications for ASO, siRNA, guide RNA, aptamer, and research or labeling oligo projects.
Oligonucleotide Synthesis
Support for modified monomers, supports, sulfurizing reagents, cap analogs, and related oligo synthesis inputs.
Public references
- Sustainability Challenges and Opportunities in Oligonucleotide Manufacturing
Journal of Organic Chemistry, 2021
Product-family technical context
- Solid-phase supports for oligonucleotide synthesis
Current Protocols in Nucleic Acid Chemistry, 2013
Product-family technical context
- Deoxynucleoside phosphoramidites—A new class of key intermediates for deoxypolynucleotide synthesis
Tetrahedron Letters, 1981
Product-family technical context
- Synthesis of deoxyoligonucleotides on a polymer support
Journal of the American Chemical Society, 1981
Product-family technical context
- PubChem Compound 135506969
PubChem · CID 135506969
Frequently Asked Questions
What is an N3'→P5' phosphoramidate?
It is a modified backbone linkage in which the phosphorus joins the 3'-nitrogen of one nucleoside to the 5'-oxygen of the next (a P-N bond), instead of the natural 3'-oxygen phosphodiester. It is built from 3'-amino-3'-deoxy nucleosides like this one.
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