Synthesis of new hemilabile ligands based on phosphinic amide and pyrazolo[1,5-c]quanazoline moieties Applications in coordination chemistry

Synthesis of new hemilabile ligands based on phosphinic amide and pyrazolo[1,5-c]quanazoline moieties Applications in coordination chemistry

Marra, Roberta K. F.; Bernardino, Alice M. R.; Souza, Marcos C. de; Romeiro, Gilberto A.; Iglesias, María J.; López-Ortiz, Fernando

Abstract:

We have previously shown that bis(phosphinic amide)-phosphine oxides can be accessed via directed ortho lithiation (DoM) of phosphinic amides. The tridentate ligand was the basis for the development of membrane and optical fiber luminescence sensors. We envisaged that this methodology could be extended to the synthesis of new hemilabile O,N-chelating ligands. Here we describe the preparation of pirazoloquinazolinephosphinic amide ligands through condensation of o-formylphosphinic amides with 2-pyrazolylanilines followed by oxidation and their complexation behavior towards zinc salts.

We have previously shown that bis(phosphinic amide)-phosphine oxides can be accessed via directed ortho lithiation (DoM) of phosphinic amides. The tridentate ligand was the basis for the development of membrane and optical fiber luminescence sensors. We envisaged that this methodology could be extended to the synthesis of new hemilabile O,N-chelating ligands. Here we describe the preparation of pirazoloquinazolinephosphinic amide ligands through condensation of o-formylphosphinic amides with 2-pyrazolylanilines followed by oxidation and their complexation behavior towards zinc salts.

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DOI: 10.5151/chempro-15bmos-BMOS2013_201381913053

Referências bibliográficas

• [1] 1 Popovici, C.; Fernández, I.; Oña-Burgos, P.; Roces, L.; García-Granda- S.; López-Ortiz, F. Dalton Trans. 2011, 40, 6691.
• [2] 2 (a) Sainz-Gonzalo, F. J.; Casimiro, M.; Popovici, C.; Rodríguez-Diéguez, A.; Fernández-Sánchez, J. F.; Fernández, I. López-Ortiz, F.; Fernández-Gutiérrez A. Dalton Trans. 2012, 41, 6735. (b) Sainz-Gonzalo, F. J.; Elosua, C.; Fernández-Sánchez, J. F.; Popovici, C.; Fernández, I.; Ortiz, F. L.; Arregui, F. J.; Matias, I. R.; Fernández-Gutiérrez, A. Sensor. Actuat. BChem. 2012, 173, 254.

Como citar:

Marra, Roberta K. F.; Bernardino, Alice M. R.; Souza, Marcos C. de; Romeiro, Gilberto A.; Iglesias, María J.; López-Ortiz, Fernando; "Synthesis of new hemilabile ligands based on phosphinic amide and pyrazolo[1,5-c]quanazoline moieties Applications in coordination chemistry", p-43-43. In: In Blucher Chemistry Proceedings, São Paulo, v. 1, n. 2, Dezembro.2013. São Paulo: Blucher, 2013.
ISSN 23184043, DOI 10.5151/chempro-15bmos-BMOS2013_201381913053