SnCl4 versus TiCl4-mediated coupling between N-6-benzoyladenine and perbenzoylated 2-deoxypyranose: Application to the synthesis of certain homochiral acyclo and carboacyclonucleosides
1,3,4-tri-O-benzoyl 2-deoxyribopyranose and persilylated N-6-benzoyladenine react in two different and regioselective ways according to the nature of the coupling reagent SnCl4 or TiCl4. The former Lewis acid gives rise to the anomer
Improved procedure for the regiospecific synthesis of 2'-deoxyribonucleosides
2'-Deoxyribonucleosides are regiospecifically synthesized in high yields by catalyzing with KI-dibenzo-18-crown-6 PTC the condensation between unprotected silylated purines and pyrimidines and the appropriate easily available 2-deoxy-ribofuranosyl or pyranosyl sugar derivatives.
Baud,Chavis,Lucas,Imbach
p. 4437 - 4440
(2007/10/02)
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