Aldose orthoacyl halide

Aldose Orthoacyl Halide. The common tetraacetyl-n-glucosyl chloride belongs to the ds series, since it does not give orthoesters, whereas 

The subsequent attack of the nucleophilic chloride ion occurs either on the original carbonium ion (B ), or on its isomeric orthoester form (B), which can easily arise through the participation of the neighboring acetoxyl group. 

Aluminum chloride has also been used for the preparation of acetylmaltose 1,2-orthoacetyl chloride. This reagent is a powerful electro- 

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