10.6084/m9.figshare.11807016.v1 Fatemeh Tajali Rad Fatemeh Tajali Rad Hassan Kefayati Hassan Kefayati Shahab Shariati Shahab Shariati Synthesis of Novel Pyrimido[1,2-<i>a</i>]Pyrimidines by Fe<sub>3</sub>O<sub>4</sub>@PAP as an Efficient and Reusable Magnetic Nanocatalyst Taylor & Francis Group 2020 Fe3O4 Fe3O4@PAP Pyrimido[12-a]pyrimidine 3-formylchromone 2-amino-14-dihydropyrimidines 2020-02-05 11:07:54 Journal contribution https://tandf.figshare.com/articles/journal_contribution/Synthesis_of_Novel_Pyrimido_1_2-_i_a_i_Pyrimidines_by_Fe_sub_3_sub_O_sub_4_sub_PAP_as_an_Efficient_and_Reusable_Magnetic_Nanocatalyst/11807016 <p>Novel 2-amino-1,4-dihydropyrimidines derivatives was synthesized by the reaction of guanidine hydrochloride, aromatic aldehyde and ethyl benzoylacetate under ultrasound irradiation. Then, the reaction of 2-amino-1,4-dihydropyrimidines and 3-formylchromone for the synthesis of novel pyrimido[1,2-<i>a</i>]pyrimidine was studied in the presence and absence of Fe<sub>3</sub>O<sub>4</sub>@PAP as catalyst. The results show that, the products in the presence of catalyst were obtained in highest yield and at least time, that confirmed the efficiency of Fe<sub>3</sub>O<sub>4</sub>@PAP.</p>