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We report on a new analogue of locked cyclohexane nucleic acids that contains an adenine nucleobase at an alternative position and which resembles homo-DNA. The crucial locked carbocyclic nucleoside monomer was prepared with high enantioselectivity and was subsequently incorporated into a pair of modified oligonucleotides that were subjected to hybridization studies. [ABSTRACT FROM AUTHOR]

Taurine (2-aminoethanesulfonic acid) is a representative substructure in biologically active compounds, but can raise difficulties in direct coupling reactions. In this study, the synthesis of taurine-derived sulfonic acids and analogous aromatic sulfonic acids was accomplished by a performic acid promoted oxidation of corresponding symmetrical disulfide precursors. In some of the products, the taurine or sulfanilic acid nitrogen atom is incorporated in a heterocyclic scaffold or part of a peptide bond in dipeptide mimetics. [ABSTRACT FROM AUTHOR]