‘Active’ conformation of the inositol monophosphatase substrates adenosine 2′-phosphate and inositol phosphate: role of the ribofuranosyl O-atom and inositol O-atoms in chelating a second magnesium ion
regioselectively), is demonstrated. The method is based on the selective recognition of cis‐vicinal OH groups in sugars and leads to the one‐pot removal of the cis‐vicinal OH groups, without protection of OH groups (except the OH group of the hemiacetal group), over a heterogeneous CeO2‐supported ReOx and Pd (ReOx‐Pd/CeO2) catalyst by using H2 as a reducing agent.
Synthesis of New Optically Active Bis- and Tris(phosphines)
作者:Henri Brunner、Hans-Jürgen Lautenschlager
DOI:10.1055/s-1989-27368
日期:——
The synthesis of new optically active alkanediylbis- and alkanetriyltris(diphenylphosphines) is described. Easily accessible optically pure lactones and carboxylic acids are reduced to the alcohols, tosylated and reacted with lithium diphenylphosphide to give the corresponding phosphines.
Unprecedented copper(I)-catalyzed photochemical reaction of diethyl ether with vicinal diols and ketals
作者:Sujit Mondal、Ram Naresh Yadav、Subrata Ghosh
DOI:10.1016/j.tetlet.2010.06.080
日期:2010.8
A novel Cu(I)-catalyzed photochemical reaction of diethyl ether with vicinaldiols and their ketals is reported. The most remarkable feature is the transformation of 1,2-diols and their ketals to acetals of acetaldehyde under totally neutral condition without using acetaldehyde.
‘Active’ conformation of the inositol monophosphatase substrates adenosine 2′-phosphate and inositol phosphate: role of the ribofuranosyl O-atom and inositol O-atoms in chelating a second magnesium ion
作者:Andrew G. Cole、David Gani
DOI:10.1039/c39940001139
日期:——
A high energy conformation, in which the adenine moiety of adenosine 2â²-phosphate occupies a C-1â²-axial ribofuranosyl position, is stabilised through the chelation of a second (additional) Mg2+ ion by the 2â²-and furanose ring O-atoms; with inositol 1-phosphate as the substrate, the 1- and 6-O-atoms chelate the second Mg2+ ion and for both substrates a different (buried) Mg2+ ion interacts directly with the phosphate moiety.