The important role of (R)-4-Hydroxydinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine 4-oxide

If you are interested in 39648-67-4, you can contact me at any time and look forward to more communication.Electric Literature of 39648-67-4

Electric Literature of 39648-67-4, Chemistry can be defined as the study of matter and the changes it undergoes. You’ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.39648-67-4, Name is (R)-4-Hydroxydinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine 4-oxide, molecular formula is C20H13O4P. In a patent, introducing its new discovery.

Active carbons which catalyze the racemization of 1.1′-binaphthyl are not effective in racemizing the 2,2′-dihydroxyl and the 8,8′-dicarbomethoxyl derivatives of binaphthyl.The 2,2′-binaphthyl methyl phosphate ester derived from optically active 1,1′-bi-2-naphthol undergoes slow thermal racemization at 190 deg C (t1/2 100 min, DeltaH(excit.) 26.1 kcal/mol, DeltaS(excit.) -21 cal/mol deg) in triglyme and this racemization rate is also unaffected by active carbon.However, in the hydroxylic solvent 2-(2-ethoxyethoxy)ethanol at 130 deg C the rate of solvolysis of the phosphate ester is increased ca. tenfold by carbon blacks or decolorizing carbon at 1 mg/mL concentration.Control experiments show that the acceleration is not due to soluble impurities released by the carbons; heterogeneous catalysis, probably by acidic and/or nucleophilic functional groups on the carbon surfaces, is involved.

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Reference:
Chiral Catalysts,
Chiral catalysts – SlideShare