Abstract
AbstractThe detailed preparation of deoxyribonucleoside phosphoramidites bearing a 4‐[N‐methyl‐N‐(2,2,2‐trifluoroacetyl)amino]butyl group for P(III) protection is presented. The use of this group circumvents nucleobase alkylation during oligonucleotide deprotection. Two syntheses of phosphoramidites starting from either a phosphordichloridite precursor or a bis‐(N,N‐diisopropylamino)chlorophosphine intermediate are described for the phosphinylation of suitably protected deoxyribonucleosides.
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