Abstract
The reaction of (2S,3S,4R)-2,3,4,7-tetrahydroxy-6-oxoheptanals with lower alcohols produced protected 3-deoxy-d-arabino-2-heptulosonates. The key transformation is based on an 1,4-O–O silyl group migration, followed by 6-exo-trig cyclisation to give the final pyranose.
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