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GRAPHICAL ABSTRACT
ABSTRACT
A short overview of the syntheses, properties and some reactions of pyrido-anellated 1.3-azaphospholes is presented. Except for 2-phosphaindolizines, which have been intensively studied with respect to syntheses, electrophilic substitution and cycloadditions, this is a class of compound that has still been only sparingly investigated. Preliminary results and hints as to possible perspectives are included to encourage further research on these novel P,N hybrid ligands.
Acknowledgments
We thank Dr. M. K. Kindermann, G. Thede and M. Steinich for numerous NMR spectra, Prof. Dr. H.-C. Böttcher and B. Breitenstein (Department Chemie, Ludwig-Maximilians-Universität München) for HRMS (DEI) and Dr. H. Frauendorf and G. Sommer-Udvarnoki (Georg-August-Universität Göttingen, Institut für Organische und Biomolekulare Chemie) for HRMS (ESI) measurements, performed within our contributions to this research.
Funding
A scholarship to M.S.S.A. by the Deutsche Akademische Auslandsdienst (DAAD) and financial support of the investigations on pyridoazaphospholes within a project on anellated 1H-1,3-azaphospholes is kindly acknowledged.