We synthesized hetero-DielsâAlder cycloadducts from acyl nitroso derivatives and 9,10-dimethylanthracene, to be photo-inducible HNO-releasing agents and found that introduction of conjugated nitroaromatic groups effectively enhanced the responsiveness of HNO release to UV-A irradiation; we confirmed photoinduced HNO formation by EPR and GCMS analysis.
One-Pot Curtius Rearrangement Processes from Carboxylic Acids
作者:Hélène Lebel、Olivier Leogane
DOI:10.1055/s-0029-1216795
日期:2009.6
An efficient and practical synthesis of amine derivatives from carboxylic acids is described using new one-potCurtiusrearrangement processes. The preparation of carbamate-protected amines and anilines, as well as ureas was achieved in good to excellent yields on a multigram scale. Curtiusrearrangement - acyl azides - carbamates - protected amino acids - anilines - ureas
A hydrophilic hetero-Diels–Alder cycloadduct was synthesized as a novel photocontrollable donor of reactive nitrogen species. Production of either nitric oxide (NO) or nitroxyl (HNO) was photoinduced from this compound, depending on the environmental polarity.
Curtius Rearrangement of Aromatic Carboxylic Acids to Access Protected Anilines and Aromatic Ureas
作者:Hélène Lebel、Olivier Leogane
DOI:10.1021/ol0622920
日期:2006.12.1
The reaction of a chloroformate or di-tert-butyl dicarbonate and sodium azide with an aromatic carboxylic acid produces the corresponding acyl azide, presumably through the formation of an azidoformate. The acyl azide undergoes a Curtius rearrangement to form an isocyanate derivative which is trapped either by an alkoxide or by an amine to form the aromatic carbamate or urea. The reaction conditions
Investigation of the dynamic nature of 1,2-oxazines derived from peralkylcyclopentadiene and nitrosocarbonyl species
作者:Victoria K. Kensy、Gregory I. Peterson、Derek C. Church、Neal A. Yakelis、Andrew J. Boydston
DOI:10.1039/c6ob00400h
日期:——
We have investigated the dynamic nature of 1,2-oxazines, which revealed broad tunability and potential for applications in covalent adaptable materials.