prov:value
| - (ii) reacting 1,4-dideoxy-1,4-imino-2,3O-isopropylidene-??-D-lyxitol or 1,4-dideoxy-1,4-imino-2,3-O-isopropylidene-??-D-mannitol with a compound of the formula R6 --CO--R4 wherein R6 is a halogen preferably fluorine, chlorine, iodine, and bromine and R4 is p-nitrobenzyl, octanyl or butyl under alkaline conditions, when a compound of the formula I is required wherein R3 is CH2 O--CO--R4 wherein R4
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