From Diol Groups on Acyclic Carbohydrates

From Diol Groups on Acyclic Carbohydrates.—The known tri-O-benzylidene 

Acid-catalysed dibutylidenation of 1-deoxy- and 3-O-methyl-D-glucitol under conditions of thermodynamic control yielded the 2,4 5,6-diacetals as the principal products, whereas 2-deoxy-D-ara6mo-hexitol i.e, 2-deoxy-D-glucitol) gave mainly the l,3 4,6-diacetal.  

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