REACTIONS OF DIMESYLTHYMIDINE WITH SECONDARY-AMINES - EASY ACCESS TO ,5'-DIDEOXY-3'-SUBSTITUTED-5'-ALKYLAMINOTHYMIDINES - NEW CLASSES OF POTENTIAL ANTIVIRAL AMINONUCLEOSIDES
K. Sakthivel et al., REACTIONS OF DIMESYLTHYMIDINE WITH SECONDARY-AMINES - EASY ACCESS TO ,5'-DIDEOXY-3'-SUBSTITUTED-5'-ALKYLAMINOTHYMIDINES - NEW CLASSES OF POTENTIAL ANTIVIRAL AMINONUCLEOSIDES, Tetrahedron, 49(20), 1993, pp. 4365-4372
3,5'-Di-O-mesylthymidine 4a (DMST) on reaction with secondary amines u
ndergoes hitherto unknown ''one-pot-two-steps'' transformation to prod
uce 2,3'-O-anhydro-5'-deoxy-5'-alkylaminothymidines 5a-h. Most of the
amines used, irrespective of their basicities showed remarkable select
ivity towards the 5'-substitution over the 2,3'-O-anhydro ring formati
on. Compounds 5a-h could be used as intermediates for the synthesis of
a variety of ,5'-dideoxy-3'-substituted-5'-alkylaminothymidines of th
e type 9, 10a-b, 11.