Hydrazones as a privileged structural linker in antitubercular agents: a review.

Hydrazones are a versatile linker of connecting various classes of organic compounds with a unique structural feature of hydrogen bonding donor and the hydrogen bonding acceptor region. An extensive number of research has been carried out on hydrazone derivatives as a potent class of antitubercular agents. The present review focuses on the chemistry, antitubercular activity and structure activity relationship (SAR) of diverse classes of phenyl and heterocyclic based hydrazones.