Efficient incorporation of 1-(2-deoxy-β-d-ribofuranosyl)-2-oxo-imidazole-4-carboxamide into DNA via a suitable convertible phosphoramidite derivative
作者:Claudio Cadena-Amaro、Sylvie Pochet
DOI:10.1016/j.tet.2005.03.040
日期:2005.5
The synthetic scheme of 1-(2-deoxy-β-d-ribofuranosyl)-2-oxo-imidazole-4-carboxamide (3) is based on the ring contraction of pyrimidine (5-BrdU) into imidazolin-2-one. The rearrangement leads to the unexpected mixture of the deoxynucleoside 4β and its α anomer. The mechanism of the anomerisation under basic conditions is proposed. Further conversion of 4-carboxylic acid into amide affords the title