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Abstract
Synthesis of four methylene(methylimino) (MMI) linked dimers modifed at the 2′-position with fluoro and/or methoxy groups and their incorporation into different sequences has been accomplished. From these dimers, bis 2′-OMe MMI dimer was selected for further studies based on its synthetic accessibility, conformational study by NMR, and Tm analysis. Several chimeric antisense oligomers containing bis 2′-OMe dimers have been synthesized on a 10 μmol scale for in vivo studies.