Carbon-nitrogen bond forming reactions reductive-cyclization

In the coordination unsaturated compounds (which are able to coordinate with one or two ligands) such as the Wilkinson complex, an aldehyde carbonyl, nitrogen group of diazo compound and carbon-carbon unsaturated bond oxidatively add to the compounds, and the cyclization is liable to proceed by reductive elimination [98-102]. For example, 4-pentene-l-al derivative reacts in the presence of the Wilkinson complex to afford prostaglandin derivatives by cyclization [98,101]. When the reaction is performed with a chiral rhodium complex, the cyclization product is obtained in a high ee% yield [102]. The cyclization usually forms five or six-membered ring compounds, the reaction of a diazo compound with acetylenic... 

---