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Design and Synthesis of Near-IR Fluorophores
A. Loudet, R. Bandichhor, K. Burgess*, A. Palma, S. O. McDonnell, M. J. Hall, D. F. O’Shea*
Texas A&M University, College Station, USA and University College Dublin, Ireland
22 January 2009 (online)
The authors present new B,O-chelated azadipyrromethenes combining two BODIPY-derived scaffolds with red-shifted fluorescence. They first attempted simultaneous deprotection and cyclization of 1a-d; however, the desired product containing electron-donating groups (EDG) was not isolated. A second route was then developed following a known mechanism starting from chalcones 3a-c.