The present invention provides a process for preparing 5-(acetylamino)-4-[(aminoiminomethyl)amino]-2,6-anhydro-3,4,5-trideoxy-D-glycero-D-galacto-non-enonic acid Formula (I), which process comprises reducing compound of Formula (IV) by Lindlar catalyst in presence of hydrogen to obtain compound of Formula (V). reacting compound of Formula (V) with pyrazole-1H-carboxamidine or its suitable salt to obtain compound of Formula (VIII). hydrolyzing the compound of Formula (VIII) to give compound of Fo...

The present invention provides a process for preparing 5-(acetylamino)-4-[(aminoiminomethyl)amino]-26-anhydro-345-trideoxy-D-glycero-D-galacto-non-enonic acid Formula (I) which process comprises reducing compound of Formula (IV) by Lindlar catalyst in presence of hydrogen to obtain compound of Formula (V). reacting compound of Formula (V) with pyrazole-1H-carboxamidine or its suitable salt to obtain compound of Formula (VIII). hydrolyzing the compound of Formula (VIII) to give compound of Formul...

Novel dual-targeted, bifunctional anti-influenza drugs formed by conjugation with anti-inflammatory agents are disclosed. Exemplary drugs according to the invention include caffeic acid (CA)-bearing zanamivir (ZA) conjugates ZA-7-CA (1), ZA-7-CA-amide (7) and ZA-7-Nap (43) for simultaneous inhibition of influenza virus neuraminidase and suppression of proinflammatory cytokines. Synthetic methods for preparation of these enhanced anti- influenza conjugate drugs are provided. The synthetic bifunct...