| 摘要 |
<p>The present invention provides a novel method for preparing compounds N-(4-nitro-2- sulfamoyl-phenyl)-malonamic acid methyl ester and N-(4-amino-2-sulfamoyl-phenyl)- malonamic acid methyl ester, which are novel intermediates for preparing a key intermediate N- (4-methanesulfonylamino-2-sulfamoyl-phenyl)-malonamic acid methyl ester, for the preparation of N-(3 - {( 1 R,2S,7R,8S)-3 -[(4-fluorophenyl)methyl] -6-hydroxy-4-oxo-3 -azatricyclo [6.2.1.02'7]undec-5-en-5-yl}-l,l-dioxo-l,4-dihydro-lX6,2,4-benzothiadiazin-7- yl)methanesulfonamide, also known commercially as Setrobuvir, a compound useful in treating hepatitis C.</p> |
