First regioselective enzymatic acylation of amino groups applied to pyrimidine 3',5'-diaminonucleoside derivatives. Improved synthesis of pyrimidine 3',5'-diamino-2',3',5'-trideoxynucleosides
J Org Chem. 2001 Jun 1;66(11):4079-82.
doi: 10.1021/jo010048a.