Insights into the mechanistic and synthetic aspects of the Mo/P-catalyzed oxidation of N-heterocycles
作者:Oleg V. Larionov、David Stephens、Adelphe M. Mfuh、Hadi D. Arman、Anastasia S. Naumova、Gabriel Chavez、Behije Skenderi
DOI:10.1039/c4ob00115j
日期:——
Mechanistic and synthetic studies of the Mo/P-catalyzed N-oxidation of N-heterocycles with hydrogen peroxide shed light on the role and nature of the catalytically active species.
钼/磷催化的N-杂环与过氧化氢的N-氧化反应的机理和合成研究揭示了催化活性物种的作用和性质。
Base free regioselective synthesis of α-triazolylazine derivatives
A regioselective α-heteroarylation followed by deoxygenation towards the synthesis of variety of azine triazole from simple azine N-oxides derivatives and N-tosyl-1,2,3-triazoles has been described. The reaction is metal free and basefree with shorter reaction time, high yields and a broad substrate scope.
The present invention provides phenoxyacetic acid derivatives of Formula (I) for the treatment of CRTH2 related disorders and disease selected from asthma, atopic dermatitis and inflammatory dermatoses.
aromatic amines, anilines and tertiaryamines with dimethyldioxirane (DMD) was examined. Treatment of heterocyclic aromatic amines and anilines with a slight excess of DMD at 0 °C afforded the corresponding N-oxides in quantitative conversion yields. In addition, the oxidation was chemoselective in the presence of carbon-carbon double bonds. On the other hand, most of the tertiaryamines assayed did
Disclosed are novel carbapenem derivatives characterized by a 2-substituent of the formula ##STR1## in which A represents a C.sub.1 -C.sub.6 straight or branched chain alkylene group; R.sup.5 represents an optionally substituted aliphatic, cycloaliphatic, cycloaliphatic-aliphatic, aryl, araliphatic, heteroaryl, heteroaraliphatic, heterocyclyl or heterocyclyl-aliphatic radial and ##STR2## represents a nitrogen-containing aromatic heterocycle attached to the alkylene group A at a ring carbon atom and quaternized by substituent R.sup.5. Such derivatives are useful as potent antibacterial agents.