Patent ID: 6222030
Filing Date: 2001-04-24
Classification: C07B,C07H,C40B,Y02P

Abstract:
A method for synthesizing oligonucleotides which comprises (a) condensing the 3'-OH or 5'-OH group of a support-bound nucleoside or oligonucleotide with a monomeric nucleoside phosphoramidite having a carbonate-protected hydroxyl group, to provide an intermediate in which the support-bound nucleoside or oligonucleotide is bound to the monomeric nucleoside through a phosphite triester linkage, and (b) treating the intermediate provided in step (a) with a deprotecting reagent effective to convert the carbonate-protected hydroxyl group to a free hydroxyl moiety and simultaneously oxidize the phosphite triester linkage to give a phosphotriester linkage.