The 4-(<i>N</i>-Dichloroacetyl-<i>N</i>-methylamino)benzyloxymethyl Group for 2‘-Hydroxyl Protection of Ribonucleosides in the Solid-Phase Synthesis of Oligoribonucleotides
作者:Jacek Cieślak、Andrzej Grajkowski、Jon S. Kauffman、Robert J. Duff、Serge L. Beaucage
DOI:10.1021/jo702717g
日期:2008.4.1
motivated the development of ribonucleoside phosphoramidites that would exhibit coupling kinetics and coupling efficiencies comparable to those of deoxyribonucleoside phosphoramidites. To fulfill these needs, the novel 4-(N-dichloroacetyl-N-methylamino)benzyloxymethyl group for 2‘-hydroxyl protection of ribonucleoside phosphoramidites 9a−d has been implemented (Schemes 1 and 2). The solid-phase synthesis