157543-67-4

Upstream product

• 124482-92-4 2-cyanoethyl-N,N-(diisopropylamino)chlorophosphine 
• 100898-63-3 5’-O-(4,4’dimethoxytrityl)-N4-(acetyl)-2'-deoxycytidine 
• 32909-05-0 N⁴-acetyl-2'-deoxycytidine 
• 951-77-9 2'-Deoxycytidine 
• 40615-36-9 4,4'-dimethoxytrityl chloride 

Downstream Products

• 1422956-11-3 (2R,3S,5R)-5-(4-acetamido-2-oxopyrimidin-1(2H)-yl)-2-(hydroxymethyl)tetrahydrofuran-3-yl((2R,3S,4R,5R)-4-azido-5-(6-benzamido-9H-purin-9-yl)-3-(tert-butyldimethylsilyloxy)tetrahydrofuran-2-yl)methyl 2-cyanoethyl phosphate 
• 140613-57-6 5'-O-(4,4'-dimethoxytrityl)-2'-deoxycytidine-3'-O-[(2-cyanoethyl)-N,N-diisopropylphosphoramidite] 

Relevant academic research and scientific papers

Fast Cleavage and Deprotection of Oligonucleotides

We have developed methylamine/ammonia as a fast cleavage and deprotection reagent which effects complete cleavage of oligonucleotides from the solid support in 5 min at room temperature and complete deprotection in 5 min at 65 deg C.The problem of transamination side products formation, faced with the commonly used dCbz (10percent side product) upon treatment with methylamine/ammonia, has been sucessfully solved by the use of dCac (0.0percent side product).DMT dCac phosphoramidite-methylamine/ammonia system furnished oligonucleotides in equal or superior quality as compared to the other systems.

Ultrafast cleavage and deprotection of oligonucleotides synthesis and use of C(Ac) derivatives

We have investigated the use of alkylamines as fast cleavage and deprotection reagents for the solid phase synthesis of oligonucleotides and found methylamine/ammonium hydroxide (or methylamine) as an efficient reagent. The transamination side product formed with the commonly used dC(b2) has been eliminated by the use of dC(Ac) phosphoramidite. This system has successfully been used in the synthesis of oligonucleotides and oligonucleoside phosphorothioates. DMT dC(Ac) hydrogen phosphonate and DMT ribo C(Ac)-2'-OMe phosphoramidite also have been prepared and used in the synthesis of oligonucleotides.