Novel Formation and Crystal Structure of 2-(2,2,2-Trifluoroethylidene)-6-trifluoro-methyl-2,3-dihydro-4H-1,4-oxazin-3-ones from N-Acetyl-N-alkyl-a-amino Acids
摘要:
The title compounds (2a-g) were formed from N-acetyl-N-alkyl-alpha-amino acids (la-g) on treatment with trifluoroacetic anhydride in the presence of pyridine. The structure of the product (2a) was determined by single crystal X-Ray analysis.
The present disclosure relates to compounds, compositions and methods for the treatment of hepatitis C virus (HCV) infection. Also disclosed are pharmaceutical compositions containing such compounds and methods for using these compounds in the treatment of HCV infection.
The 1,3-dipolar cycloaddition of several substituted Münchnones with methyl α-cyanocinnamate and α-cyanocinnamonitrile leads to 2-pyrrolines which may be aromatized to pyrroles. This study shows the influence of steric factors on the regioselectivity of the reaction which is “a priori” difficult to predict.