Studies On Hydrogenation Of Unactivated Carbon Carbon Multiple Bond Using Hantzsch Ester

Hantzsch ester (HEH) has been developed as an efficient reductant for carbon carbon double bonds and imines, etc. This thesis focuses on the hydrogenation of unactivated carbon carbon multiple bonds using HEH, divided mainly into the following three parts:1. The new progress made in the HEH based reactions in recent years was concisely reviewed. The review focuses on the role of HEH in these hydrogen transfer reactions.2. The hydrogenation (semi-hydrogenation) of unactivated carbon carbon multiple bonds using Hantzsch ester catalyzed by palladium on carbon has been achieved. And a conceivable mechanism is depicted.3. A further application of Hantzsch ester as an organic reducing agent was well performed in the synthesis of 3,4-dihydrocoumarin via microwave irradiation.