The selective cleavage of methoxy protectinggroups next to hydroxy groups is achieved using a radical hydrogen abstraction reaction as the key step. Under the reaction conditions, the hydroxy group generates an alkoxyl radical that reacts with the sterically accessible adjacent methoxy group, which is transformed into an acetal. In the second step, the acetals are hydrolyzed to give alcohols or diols
Polyphosphates and Pyrophosphates of Hexopyranoses as Allosteric Effectors of Human Hemoglobin: Synthesis, Molecular Recognition, and Effect on Oxygen Release
作者:Konstantina C. Fylaktakidou、Carolina D. Duarte、Alexandros E. Koumbis、Claude Nicolau、Jean-Marie Lehn
DOI:10.1002/cmdc.201000366
日期:2011.1.3
partially protected carbohydrates as potential allostericeffectors of hemoglobin. A study toward the construction of seven‐ and eight‐membered cyclic pyrophosphates was also performed on the sugars which had the proper orientation, protection, and number of phosphates. All final compounds were tested for their efficiency on oxygenrelease from humanhemoglobin. Several compounds presented higher potency