Building Blocks for the Solution Phase Synthesis of Oligonucleotides: Regioselective Hydrolysis of 3‘,5‘-Di-<i>O</i>-levulinylnucleosides Using an Enzymatic Approach
作者:Javier García、Susana Fernández、Miguel Ferrero、Yogesh S. Sanghvi、Vicente Gotor
DOI:10.1021/jo020080k
日期:2002.6.1
opposite selectivity toward the hydrolysis at the 3'-position, affording 5'-O-levulinyl derivatives 4 in >70% yields. A similar hydrolysis procedure was successfully extended to the synthesis of 3'- and 5'-O-levulinyl-protected 2'-O-alkylribonucleosides 7 and 8. This work demonstrates for the first time application of commercial CAL-B and PSL-C toward regioselective hydrolysis of levulinyl esters with excellent