N-PENT-4-ENOYL (PNT) GROUP AS A UNIVERSAL NUCLEOBASE PROTECTOR - APPLICATIONS IN THE RAPID AND FACILE SYNTHESIS OF OLIGONUCLEOTIDES, ANALOGS, AND CONJUGATES
Rp. Iyer et al., N-PENT-4-ENOYL (PNT) GROUP AS A UNIVERSAL NUCLEOBASE PROTECTOR - APPLICATIONS IN THE RAPID AND FACILE SYNTHESIS OF OLIGONUCLEOTIDES, ANALOGS, AND CONJUGATES, Tetrahedron, 53(8), 1997, pp. 2731-2750
Rapid synthesis of phosphoric diester and phosphorothioate oligonucleo
tides in 1 micromol to 1 millimol scale has been achieved using PNT nu
cleoside phosphoramidites. Furthermore, facile synthesis of mixed back
bone oligonucleotides (MBOs) as antisense agents can be carried out us
ing PNT nucleoside phosphoramidites in conjunction with PNT nucleoside
H-phosphonates and PNT nucleoside phosphonamidites. The versatility o
f the PNT group is further demonstrated by its use in the preparation
of bioreversible oligonucleotide conjugates. (C) 1997 Elsevier Science
Ltd.