摘要:
Compounds of formulae ##STR1## wherein X is O;R.sup.1 is OH, phosphate, diphosphate, triphosphate or (CH.sub.2).sub.n --O--CH.sub.2 --O--P(.dbd.O)(OH).sub.2 wherein n is 0-2;R.sup.2 is H and R.sup.3 is CH.sub.3, CH.sub.2 OH, CH.sub.2 --O--CH.sub.3, CH.sub.2 SH, CH.sub.2 F or CH.sub.2 N.sub.3 ; orR3 is H and R.sup.2 is CH.sub.3, CH.sub.2 OH, CH.sub.2 --O--CH.sub.3, CH.sub.2 SH, CH.sub.2 F or CH.sub.2 N.sub.3 ;and Z is Cl, Br, I, acyloxy or alkoxy;are synthesized from acyclic intermediates and are subsequently useful in the preparation of nucleoside analogues with antiviral activity against retroviruses such as HIV and hepatitis B.