L. Pickering et al., THE SYNTHESIS OF 4'-T-BUTYLCARBAMYL-2',3'-DIDEOXY AND 4'-P-TOLUENESULPHONAMIDYL-2',3'-DIDEOXY PYRIMIDINE NUCLEOSIDE ANALOGS, Nucleosides & nucleotides, 13(6-7), 1994, pp. 1493-1506
The preparation of 4'-t-butylcarbamyl-2',3'-dideoxy thymidine, uridine
and 5-ethyl undine nucleoside analogues and 4'-p-toluenesulphonamidyl
-2',3'-dideoxy thymidine and 5-ethyl uridine nucleoside analogues from
L-pyroglutamic acid is reported.