In heterogeneous catalysis, the catalyst is in a different phase from the reactants. At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. In an article, once mentioned the application of 499-40-1, Name is (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal,molecular formula is C12H22O11, is a conventional compound. this article was the specific content is as follows.Electric Literature of 499-40-1
In contrast to the facile formation of fac-[Re(CO)3(dpk)Cl] 1 from the reaction between [Re(CO)5Cl] and dpk [(C5H4N)2C(O)], in refluxing toluene, [Re(CO)5Cl] was recovered unchanged when di-2-pyridylamine, dpa [(C5H4N)2NH], was allowed to react with [Re(CO)5Cl] under a variety of conditions. However, a mixture of [Re(CO)5Cl] and PPh3 in refluxing toluene followed by a CH2Cl2 solution of dpa gave cis-[Re(CO)2(PPh3)(dpa)Cl]. The intermediate involved appears to be a general synthon for the binding of the ReI(CO)2(PPh3)Cl chromophore to a variety of bi- and mono-dentate nitrogen-donor ligands and has been utilized to isolate cis-[Re(CO)2(PPh3)(dpk)Cl]. Nucleophilic addition of water at the carbonylic carbon atom of co-ordinated dpk in 1 and cis-[Re(CO)2(PPh3)(dpk)Cl] resulted in the hydration of the keto group and formation of fac-[Re(CO)3{(C5H4N)2C(O)(OH)}] and cis-[Re(CO)2(PPh3){(C5H4N) 2C(O)(OH)}]. The compounds isolated exhibit rich electrochemical and photochemical properties and the potential application of fac-[Re(CO)3(dpk)Cl] as an electrochemical sensor for electrophiles and Group I and II metal ions is demonstrated.
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Reference：
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics