Dinitrogen Trioxide-Mediated Domino Process for the Regioselective Construction of 4-Nitrofuroxans from Acrylic Acids
作者:Leonid L. Fershtat、Marina I. Struchkova、Alexander S. Goloveshkin、Ivan S. Bushmarinov、Nina N. Makhova
DOI:10.1002/hc.21166
日期:2014.7
4-Nitrofuroxans (4-nitro-1,2,5-oxadiazole 2-oxides) were prepared by a dinitrogentrioxide–mediateddomino reaction of acrylicacids under the action of NaNO2 excess in AcOH at room temperature. The reaction proceeds completely regioselectively and presents a new, simple, general, and safe method for the preparation of both 3-aryl- and 3-alkyl-4-nitrofuroxans available with difficulty before. A mechanism
NOBF4-Mediated Assembly of the Sydnone Imine Scaffold in the Synthesis of Double Nitric Oxide Donors
作者:Leonid L. Fershtat、Alexander D. Shuvaev、Egor S. Zhilin
DOI:10.1055/a-2011-7264
日期:——
step was developed. The described protocol excludes the isolation of carcinogenic N-nitrosamines, operates broad substrate scope, and enables the preparation of fully substituted sydnone imines linked to the furoxan ring via different linkers or directly through C–C bond. Synthesized library of furoxan-sydnone imine hybrids demonstrated a promising ability to release NO in a wide range of concentrations
Straightforward Access to the Nitric Oxide Donor Azasydnone Scaffold by Cascade Reactions of Amines
作者:Egor S. Zhilin、Dmitry M. Bystrov、Ivan V. Ananyev、Leonid L. Fershtat、Nina N. Makhova
DOI:10.1002/chem.201903526
日期:2019.11.13
construction strategy involves a diazotization/azo coupling/elimination/double rearrangement cascade sequence of readily available amines. The current protocol enables the generation of a diverse array of azasydnones, including previously hardly accessible heteroaryl substituted azasydnones (25 examples, 70-97 % yield) with a good functional group tolerance under very mild conditions. Preliminary NO-releasing