CXIX.—Some derivatives of as-dipropyl- and -diamyl-oxamic acids

Mycosporine-Like Amino Acids and Their Derivatives as Natural Antioxidants.

Mycosporine-like amino acids (MAAs) are water-soluble molecules that absorb UV-A and UV-B radiation and disperse the energy as heat. MAAs show great diversity in their molecular structures, which exhibit a range of molecular weights spanning 188 to 1050 Daltons. MAAs are utilized in a wide variety of organisms including prokaryotes and eukaryotic micro-organisms that inhabit aquatic, terrestria...

Mineralization of the recalcitrant oxalic and oxamic

High performance liquid chromatography of fatty acids as naphthacyl derivatives

A procedure for the separation of fatty acids, after their derivatization as fatty acid naphthacyl esters, by reverse-phase high performance liquid chromatography is described. A reproducible resolution (50 min), shorter than former HPLC analyses, of a standard mixture of fatty acid naphthacyl esters (25 fatty acids; C7:0 – C22:6 n – 3), was achieved by a ternary elution gradient of methanol-ac...

Pd(II)-catalyzed decarboxylative cross-coupling of oxamic acids with potassium phenyltrifluoroborates under mild conditions.

A novel Pd-catalyzed decarboxylative cross-coupling of oxamic acids with potassium phenyltrifluoroborates has been realized under mild reaction conditions. This method provides an efficient access to N-mono- or N,N-disubstituted benzamides and benzoates.

determination of olanzapine and thiourea using electrodes modified by dna and film of copper-cobalt hexacyanoferrate & investigation of electro-oxidation of some catechol derivatives in the presence of 4-phenylsemicarbazid

چکیده هدف از این کار بررسی الکترواکسیداسیون کتکول و مشتقات آن در حضور 4-فنیل سمی کاربامازید بوده است اکسیداسیون کتکولها ترکیبات نا پایدار کینونها را تولید می کنند که این ترکیبات می تواند در واکنش مایکل بعنوان پذیرنده نوکلئوفیل عمل نمایند. در ادامه اکسایش کتکولهای (a-c1) را درحضور 4-فنیل سمی کاربامازید در محلول آب/استونیتریل (90/10)بوسیله ولتامتری چرخه ای و کولن متری در پتانسیل ثابت مورد بررسی ...