ipso-Cyclization: an emerging tool for multifunctional spirocyclohexadienones.
ipso-Annulation represents an attractive approach to synthesize a variety of spirocyclic compounds having a quaternary carbon center. Furthermore, these compounds also serve as a handy synthon for the construction of various complex molecules. This review presents various useful approaches for the intramolecular ipso-cyclization to afford a wide range of spirocyclohexadienones. In addition, the utility of spirocyclic compounds towards the synthesis of complex molecules is also included.
Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India. rajireddy@iict.res.in.
Chada Raji
CR
Reddy
Santosh Kumar
SK
Prajapti
Kamalkishor
K
Warudikar
Ravi
R
Ranjan
Billa Bhargava
BB
Rao