Acta Cryst. (2005). E61, o2955-o2957  [ doi:10.1107/S1600536805025791 ]

2-C-Benzyloxymethyl-2,3:5,6-di-O-isopropylidene-D-allono-1,4-lactone

D. J. Watkin, L. L. Parry, R. Soengas, K. Izumori and G. W. J. Fleet

Abstract: The crystal structure of the title benzyl ether, C₂₀H₂₆O₇, establishes the stereochemistry of the major diacetonide product from the Kiliani reaction of D-psicose. There are two independent molecules in the cell related by a pseudo-twofold screw axis. There are no suitable donors for strong hydrogen bonds: the molecules are simply in van der Waals contact.

Online 17 August 2005

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