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Valorization of the Modified Mono Ammonium Phosphate by Cobalt in the Synthesise of 3,4‐Dihydropyrano[c]chromene Derivatives
Author(s) -
El Hallaoui Achraf,
Chehab Soukaina,
Malek Badr,
Zimou Omar,
Ghailane Tourya,
Boukhris Said,
Souizi Abdelaziz,
Ghailane Rachida
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803551
Subject(s) - malononitrile , catalysis , cobalt , yield (engineering) , chemistry , ammonium dihydrogen phosphate , aldehyde , ammonium acetate , nuclear chemistry , ammonium nitrate , organic chemistry , materials science , fertilizer , metallurgy , high performance liquid chromatography
This work presents a simple process for the preparation of Cobalt Orthophosphate (Co 3 (PO 4 ) 2 ), by modifying phosphate fertilizer mono‐ammonium phosphate (MAP) by cobalt nitrate (Co(NO 3 ) 2 ). Co 3 (PO 4 ) 2 has been characterised using microscopic and spectroscopic methods namely X‐ray diffraction (XRD), infrared spectroscopy (IR) and scanning electron microscopy (SEM). It is the first time that Co 3 (PO 4 ) 2 is used as a heterogeneous catalyst in the condensation between an aryl aldehyde, 4‐hydroxycoumarin and malononitrile. The results show that Co 3 (PO 4 ) 2 is an effective catalyst for one‐pot synthesis of 3,4‐dihydropyrano [3, 2‐c] chromene. The optimisation of each reaction parameter allows achieving excellent results in terms of time and yield. The application of Co 3 (PO 4 ) 2 as catalyst in the 3, 4‐dihydropyrano [3, 2‐c] chromene derivatives synthesis offers certain advantages such as shorter reaction time, simple treatment, furthermore, the catalyst possesses a great capacity for reutilization and therefore its application contributes to the development of green chemistry.