Keywords
chiral dioxane
cyrene
diol.
enolization
formaldehyde
levoglucosenone
Abstract
Cyrene reacts with 35% aqueous formaldehyde in the presence of K2CO3, tetramethylguanidine and Et3N to give three products, viz., major α,α-bis(hydroxymethyl) derivative, a product of its keto group reduction, and 3,5,11,12-tetraoxatricyclo[7.2.1.02,7]dodecan-2-ol. The options for the derivatization of the hydroxy groups with benzyl, tosyl, isopropylidene, and methylene acetal protecting groups were studied.
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