A short and economical synthesis of orthogonally protected C-linked 2-deoxy-2-acetamido-alpha-D-galactopyranose derivatives

The Journal of Organic Chemistry
Vincent R Bouvet, Robert N Ben

Abstract

A short and high-yielding synthesis has been devised to prepare C-linked 2-deoxy-2-acetamido-alpha-D-galactopyranose derivative 3. One of the main advantages of this approach is that it employs commercially available and inexpensive d-glucosamine as the starting material. The key steps include a highly stereoselective C-allylation followed by epimerization of the C-4 hydroxyl group. Building block 3 and orthogonally protected C-linked 2-deoxy-2-acetamido-alpha-D-galactopyranose derivative 2 were obtained in 44% overall yield (six steps) and 29% overall yield (eight steps), respectively. This represents a significant improvement over previously reported syntheses.

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Citations

Nov 26, 2009·Chemistry : a European Journal·Taihei NishiyamaYoshiyasu Ichikawa
Sep 16, 2017·Chemical Reviews·You Yang, Biao Yu
Jan 24, 2012·Bioorganic & Medicinal Chemistry Letters·Anna K BalcerzakRobert N Ben

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