First example of carbohydrate-based Prins cyclization: a novel class of sugar-annulated tetrahydropyrans
摘要:
The secondary homoallylic alcohol derived from D-glucose undergoes smooth coupling with aldehydes in the presence of molecular iodine under mild reaction conditions to produce 7-iodofurano[3,2-b]pyrans in good yields. This method is highly stereoselective, affording cis-tetrahydropyrans exclusively. (C) 2010 Elsevier Ltd. All rights reserved.