ACETONIDES OF HEPTONOLACTONES - KILIANI ASCENSION OF 3-O-BENZYL-D-GLUCOSE AND 3-O-BENZYL-D-ALLOSE

The preparation of the δ-heptonolactones, 4- O -benzyl- D - glycero - D - D - gulo -heptono-1,5-lactoneand 4- O -benzyl- D - glycero - D - allo -heptono-1,5-lactone, by Kiliani reactions on 3- O -benzylglucose and 3- O -benzylallose are reported; acetonides of the two lactones are described.