REGIOSELECTIVE PHENYLCARBAMOYLATION OF PURINE AND PYRIMIDINE RIBONUCLEOSIDES THROUGH DIBUTYLTIN OXIDE AND TERTIARY AMINE-PHENYL ISOCYANATE SYSTEMS
Regioselective phenylcarbamoylation of ribonucleosides through the use of (Bu2SnO)n-PhNCO systems was revealed to have substantially the same tendency as observed in the reaction through (Bu3Sn)2O-PhNCO, giving the corresponding 3'-phenylcarbamates prefer