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Three model secondary alcohols have been subjected to enzymatic kinetic resolution using three common lipases and a typical acyl donor. The resolutions were performed in two pressurised low-boiling hydrofluorocarbons, which are novel media for enzymatic reactions, and five conventional organic solvents. In general, higher yields, ee’s and rates of reaction were observed in the hydrofluorocarbons.
Novel sulfamide [-NHSO 2 NH-] linked dinucleotide analogues d(TnsnT) and d(TnsnA) have been synthesised from 3 - and 5 -amino nucleosides. Treatment of these amino nucleosides with catechol sulfate results in the formation of 2-hydroxyphenyl sulfamate esters which couple smoothly in good yields with either 5 - or 3 -amines of similar nucleosides. NMR studies showed that the 3 -sulfamide...
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