Abstract
AbstractThioacetalization of acyl protected furanosides led to products with an ethanethiol group at C‐2 and 3‐O‐acetyl‐ 1,2‐di‐O‐isopropylidene‐D‐furanoses were converted into corresponding thioacetals with two ethanethiol groups at both C‐2 and C‐3 positions under the standard thioacetalization conditions. All products were characterized by 1H NMR, 13C NMR and HRMS data. X‐ray structure analysis indicates that the vicinal acyloxy group is stereoselectively substituted by ethanethiols. The supposed mechanisms for these two kinds of transformations were presented.
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