2-Phosphaindolizines

Abstract

An overview of 2-phosphaindolizines, i.e. 1,3-azaphospholo[1,5-a]pyridines along with their 1-aza-, 3-aza- and 1,3-diaza analogues has been presented. It includes their methods of syntheses, characterization and reactions. Under reactions, electrophilic substitutions, N-alkylation, Diels-Alder (DA) reactions with the >C=P- functionality in the absence of the catalyst and also in the presence of the catalyst, other 1,2-additions across the >C=P- functionality, cheletropic cycloaddition of tetrachloro-o-benzoquinone (TCQ) with the phosphorus atom and co-ordination with the metal pentacarbonyls and other derivatives have been described.

GRAPHICAL ABSTRACT

Keywords:

• 2-Phosphaindolizines
• 1-aza-2-phosphaindolizines
• 3-aza-2-phosphaindolizines
• 1,3-diaza-2-phosphaindolizines
• Diels-Alder reaction
• >C=P- functionality

Additional information

Funding

PM and NS thank the University Grants Commission, New Delhi for the financial support in the form of JRF.