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Synthesis of the Cl-ANT acyclic nucleosides. Reagents and conditions: a) DMTrCl, Py, RT, overnight; b) i) NaH, DMF, 5-chloroisatoic anhydride, 14 h; ii) 80% AcOH, RT, 2h; c) i) MsCl, Py, RT, 2 h; ii) NaN3, DMF, HMPA, 100 °C, 14 h; iii) H2/Pd/C, MeOH, RT, 24 h; d) i) 5-chloroisatoic anhydride, DMF, THF; ii) 80% AcOH, RT, 2h.
