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THERAPEUTIC EFFICACY OF STEREOISOMERS Scientia Research LibraryJournal of Applied Chemistry2348 - 0408201646 *S.S.Agrawal, Tanya Kumar1 and Mohd Mazhar2 Page No. 1-6 1 Stereoisomers are molecules that are identical in atomic constitution and bonding, but differ in the three-dimensional arrangement of the atoms. They are often readily distinguished by biological systems, however, and may have different pharmacokinetic properties (absorption; distribution, biotransformation. and excretion) and quantitatively or qualitatively different pharmacologic or toxicologic effects.Approximately 50% of marketed drugs are chiral having enantiomers and approximately 50% of these are mixtures of enantiomers rather than single enantiomers. One member of the pair may show inactivity or toxicty compared to the other one. E.g. granulocytopenia is related to the d-isomer of levodopa; Vomiting is caused by the d-isomer of levamisole; and myasthenia gravis symptoms were no longer observed when the d-isomer was removed from d,lcarnitine) etc.[1]This review article emphasis on the application of optical isomers in medical researchon issues relating to the study and pharmaceutical activityof individual enantiomers and racemates. Key Words: Enantiomer, optical isomer,pharmokinetic properties,arrangement of atoms. http://www.scientiaresearchlibrary.com/archive-abs.php?arc=487http://www.scientiaresearchlibrary.com/archive/JAC-2016-4-6-073-1-6.pdf

A Simple and convenient one pot synthesis of aminoquinone derivatives via Electrochemical amination of benzoquinone with secondary amines Scientia Research LibraryJournal of Applied Chemistry2348 - 0408201646 Jyoti Malviya1, Shashi Kala2, Hemlata Singh3, R.K.P.Singh* Page No. 7-16 1 A simple and efficient method for the convenient synthesis of aminoquinones have been described on reaction with catechol and various secondary amines using lithium perchlorate as a supporting electrolyte in acetonitrile media at platinum electrode under constant potential electrolysis. The results revealed that the o-benzoquinone derived from the oxidation of catechol, participates in Michael addition reaction with secondary amines and convert it into the aminoquinones in a good yield with high purity.The method is cost-effective, high-yielding, clean, and selective. The products of electrosynthesis have been purified and characterized by FTIR, 1HNMR, 13CNMR and mechanism was deduced with cyclic voltammetric study. Key Words: Anodic oxidation, cyclic voltammetry, electrochemical synthesis, o-benzoquinone secondary amines. http://www.scientiaresearchlibrary.com/archive-abs.php?arc=488http://www.scientiaresearchlibrary.com/archive/JAC-2016-4-6-074-7-16.pdf