Model synthesis of 2,3:5,6-di-O-isopropylidene- S-α-D-mannofuranosyl-N,N-diisopropylphosphoramidofluoridothioate and 2,3:5,6-di-O-isopropylidene-Se-α-D-mannofuranosyl-N,N-di-isopropylphosphoramidofluoridoselenoate via P(III)-OAr intermediates and a thiono-thiolo (selenono-selenolo) rearrangement
ARKIVOC