Cleavage of 2-Phenyl-1,3-dioxolanes and Benzyl Ethers by Catalytic Transfer Hydrogenation

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Abstract
The selective deprotection of 2-phenyl-1,3-dioxolane derivatives and benzyl ethers of carbohydrates can be accomplished by catalytic transfer hydrogenation using hydrazine hydrate as hydrogen donor and 10% palladium on carbon as catalyst. Under these conditions, 2-phenyl-1,3-dioxan and 2-alkyl-substituted 1,3-dioxolane moieties remain unaffected. The proposed method is effective and the deprotected compounds are obtained in high yields.

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