Tricarbonylcyclohexadienyliumiron Complexes in the Synthesis of 2-Azaspiro[5.5]undecane System with Tunable Amide.
Excellent regio- and stereoselectivity during nitrile addition to dienylium-Fe(CO)(3) can be achieved with perchlorate salts, allowing the preparation of the 1-oxo- and 3-oxo-2-azaspiro[5.5]undecane ring systems. The phthalimide complex 2 was prepared in high yield by Mitsunobo reaction.
Ong
Chi Wi
CW
Department of Chemistry, National Sun Yat Sen University, Kaoshiung, Taiwan 804.
Wang
Han Ming
HM
Chang
You Ann
YA