Riboflavin tetraacetate

Larson. R.A.. Stackhouse. P.L., and Crowley. T.O. Riboflavin tetraacetate a potentially useful photosensitizing agent for the treatment of contaminated waters. Environ. Sci TechnoL, 26(9) 1792-1798, 1992. 

Since reduced flavins, pteridine derivatives, and PQQ can be readily oxidized by oxygen to regenerate the oxidized forms [59-62], these coenzyme analogs can act as photocatalysts when the oxidation of substrates by the coenzymes occurs photochemically. No appreciable photooxidation of benzyl alcohol by oxygen occurs when aminopterin (AP), lumazine (Lu), or riboflavin-tetraacetate (FI) is used as a photocatalyst in the absence of acid in MeCN. When HC104 is added to this system, however, the flavin and pteridine derivatives are protonated as described above, and each proton-ated species (catH+) can act as an efficient photocatalyst for the oxidation of benzyl alcohol derivatives (X-C6H4CH2OH) by oxygen [70] ... 

Scheme 11. Structures and pKa values of riboflavin tetraacetate, creatinine and thymine...

Zinc(II) cyclene was linked to phenothiazene group which served as electron-donor (Scheme 22). To the complexed zinc(II), a riboflavin tetraacetate molecule coordinated. Upon irradiation, the flavin became a strong oxidant and the transfer of electrons could be easily observed by emission quenching. 

Martin CB, Shi X, Tsao M-L, Karweik D, Brooke J, Hadad CM, Platz MS. (2002) The photochemistry of riboflavin tetraacetate and nucleosides. A study using density functional theory, laser flash photolysis, fluorescence, UV-Vis and time resolved infrared spectroscopy. J Phys Chem B 106 10263-10271. 

Figure 4.7. Structures used by Reichenbach-Klinke et al. [62] as agents to reduce riboflavin tetraacetate as a model of the flavin-nicotinamide redox interaction in flavo-enzymes. The second-order rate constants shown are approximate values for the redox reaction at 50 pM concentrations of each reactant in aqueous solution at pH 7.4 and 25 °C. The first-order rate constants for compounds with a Zn-center were obtained...

Acetic acid, 2-propenyl ester. See Allyl acetate Acetic acid propyl ester Acetic acid n-propyl ester. See Propyl acetate Acetic acid, retinyl ester. See Retinyl acetate Acetic acid, riboflavin tetraester. See Riboflavin tetraacetate... 

Riboflavin 5 - (sodium hydrogen phosphate) Riboflavin sodium phosphate. See Riboflavin-5 -phosphate sodium Riboflavin tetraacetate CAS 752-13-6 EINECS/ELINCS 212-032-4 Synonyms Acetic acid, riboflavin tetraester Riboflavin, 2, 3, 4, 5 -tetraacetate Definition Tetraester of acetic acid and riboflavin Empiricai C25H28N4O10 Uses Skin conditioner in cosmetics... 

Riboflavin, 2, 3, 4, 5 -tetraacetate. See Riboflavin tetraacetate 1-p-d-Ribofuranosyluracil. See Uridine Ribonucleic acid. See RNA D-Ribose... 

Riboflavin tetraacetate Rice (Oryza sativa) bran oil RNA Royal jelly Royal Jelly extract Royal jelly powder Rutin Saccharomyces/copper ferment Saccharomyces lysate Saffron crocus (Crocus sativus) extract Sandalwood (Santalum album)... 

C25H24F6N4 Hydramethyinon C25H28N4O10 Riboflavin tetraacetate C25H30CIN3 Basic violet 3 C26H30N2O4... 

Riboflavin (vitamin B2) was esterified to the tetraesters using chlorosulfonic acid as catalyst, thus riboflavin, by warming with acetic anhydride in the presence of the reagent, afforded riboflavin tetraacetate (95% yield). ... 

Amino-3-(4 -nitrophenyl)propan-l,3-diol in its optically active form has been selectively photooxidised to the corresponding ketone, and a study of the oxidation of podophyllotoxin (27) by sodium persulfate using laser flash photolysis has enabled rate constants to be determined for the formation and decay of transients. Photoinduced electrochemical oxidation of benzyl alcohol to benz-aldehyde has been achieved with 100% product selectivity and 100% current efficiency using visible radiation in the presence of riboflavin 2, 3, 4, 5 -tetraacetate. ... 

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