N-Phenylimidazolium triflate has been invented as an extremely effective promoter for the construction of interribonucleotide linkage according to the phosphoramidite strategy.
Regiodefined synthesis and conformational properties of adenyldiyl trimers with unsymmetrical 2′–5′ and 3′–5′ internucleotide linkages
作者:Yoshihiro Hayakawa、Masaaki Hirose、Ryoji Noyori
DOI:10.1016/0040-4020(95)00590-5
日期:——
Adenyldiyltrimers with different kinds of substitucnts on 2′–5′ and 3′–5′ phosphate linkages have been synthesized in a general, regiodefined manner. Examination of the 2D NMR spectra reveals that the trimers with adenylyl(2′–5′)adenosine linkage make a syn-anti as well as syn-syn base slack between the two adenyl bases and exist as a mixture of the two conformers.
of deoxyribonucleoside 3'-(allyl N,N-diisopropylphosphoramidite)s or 3'-(2-cyanoethyl N,N-diisopropylphosphoramidite)s employed in the preparation of deoxyribonucleotides, and 3'-O-(tert-butyldimethylsilyl)ribonucleoside 2'-(N,N-diisopropylphosphoramidite)s or 2'-O-(tert-butyldimethylsilyl)ribonucleoside3'-(N,N-diisopropylphosphoramidite)sused for the formation of 2'-5' and 3'-5' internucleotide linkages