PROCESS FOR PREPARATION NUCLEOSIDE ANALOGUES USING BICYCLIC INTERMEDIATE PRODUCTS

摘要

FIELD: organic chemistry. SUBSTANCE: claimed invention describes process for production of substantially pure cis- nucleoside analogues using novel bicyclic intermediate product of formula III:wherein X is S or O; Y is S, CH, O or CH(R) wherein R is azido or halogen; and Z is S or O. EFFECT: more efficient production process.